Finding the Fourth Proportional to 60,798.90, 83,892.56 and 55,899.72

Step by Step Solution

1. Step 1: Write the proportion equation
   60,798.90 : 83,892.56 = 55,899.72 : x
2. Step 2: Convert to fraction form
   60,798.90/83,892.56 = 55,899.72/x
3. Step 3: Cross multiply
   60,798.90x = 83,892.56 × 55,899.72
4. Step 4: Simplify right side
   60,798.90x = 4,689,570,649.02
5. Step 5: Solve for x
   x = 4,689,570,649.02/60,798.90
6. Step 6: Final answer
   x = 77,132.49