Finding the Fourth Proportional to 1,169,562.78, 1,613,906.55 and 660,315.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,169,562.78 : 1,613,906.55 = 660,315.42 : x
2. Step 2: Convert to fraction form
   1,169,562.78/1,613,906.55 = 660,315.42/x
3. Step 3: Cross multiply
   1,169,562.78x = 1,613,906.55 × 660,315.42
4. Step 4: Simplify right side
   1,169,562.78x = 1,065,687,381,404.00
5. Step 5: Solve for x
   x = 1,065,687,381,404.00/1,169,562.78
6. Step 6: Final answer
   x = 911,184.42