Finding the Fourth Proportional to 912,541,105.72, 1,259,307,061.58 and 494,853,280.28

Step by Step Solution

1. Step 1: Write the proportion equation
   912,541,105.72 : 1,259,307,061.58 = 494,853,280.28 : x
2. Step 2: Convert to fraction form
   912,541,105.72/1,259,307,061.58 = 494,853,280.28/x
3. Step 3: Cross multiply
   912,541,105.72x = 1,259,307,061.58 × 494,853,280.28
4. Step 4: Simplify right side
   912,541,105.72x = 623,172,230,302,630,912
5. Step 5: Solve for x
   x = 623,172,230,302,630,912/912,541,105.72
6. Step 6: Final answer
   x = 682,897,708.82