Finding the Fourth Proportional to 105,087.66, 145,024.16 and 59,772.15

Step by Step Solution

1. Step 1: Write the proportion equation
   105,087.66 : 145,024.16 = 59,772.15 : x
2. Step 2: Convert to fraction form
   105,087.66/145,024.16 = 59,772.15/x
3. Step 3: Cross multiply
   105,087.66x = 145,024.16 × 59,772.15
4. Step 4: Simplify right side
   105,087.66x = 8,668,406,314.27
5. Step 5: Solve for x
   x = 8,668,406,314.27/105,087.66
6. Step 6: Final answer
   x = 82,487.39