Finding the Fourth Proportional to 468,139,128, 701,231,522.56 and 280,798,944

Step by Step Solution

1. Step 1: Write the proportion equation
   468,139,128 : 701,231,522.56 = 280,798,944 : x
2. Step 2: Convert to fraction form
   468,139,128/701,231,522.56 = 280,798,944/x
3. Step 3: Cross multiply
   468,139,128x = 701,231,522.56 × 280,798,944
4. Step 4: Simplify right side
   468,139,128x = 196,905,071,034,360,160
5. Step 5: Solve for x
   x = 196,905,071,034,360,160/468,139,128
6. Step 6: Final answer
   x = 420,612,290.79