Finding the Fourth Proportional to 87,111.68, 120,086.86 and 61,572.98

Step by Step Solution

1. Step 1: Write the proportion equation
   87,111.68 : 120,086.86 = 61,572.98 : x
2. Step 2: Convert to fraction form
   87,111.68/120,086.86 = 61,572.98/x
3. Step 3: Cross multiply
   87,111.68x = 120,086.86 × 61,572.98
4. Step 4: Simplify right side
   87,111.68x = 7,394,105,829.04
5. Step 5: Solve for x
   x = 7,394,105,829.04/87,111.68
6. Step 6: Final answer
   x = 84,880.77