Finding the Fourth Proportional to 85,586.76, 118,142.15 and 76,618.17

Step by Step Solution

1. Step 1: Write the proportion equation
   85,586.76 : 118,142.15 = 76,618.17 : x
2. Step 2: Convert to fraction form
   85,586.76/118,142.15 = 76,618.17/x
3. Step 3: Cross multiply
   85,586.76x = 118,142.15 × 76,618.17
4. Step 4: Simplify right side
   85,586.76x = 9,051,834,949.77
5. Step 5: Solve for x
   x = 9,051,834,949.77/85,586.76
6. Step 6: Final answer
   x = 105,762.09