Finding the Fourth Proportional to 78,684.55, 108,583.31 and 42,874.85

Step by Step Solution

1. Step 1: Write the proportion equation
   78,684.55 : 108,583.31 = 42,874.85 : x
2. Step 2: Convert to fraction form
   78,684.55/108,583.31 = 42,874.85/x
3. Step 3: Cross multiply
   78,684.55x = 108,583.31 × 42,874.85
4. Step 4: Simplify right side
   78,684.55x = 4,655,492,914.38
5. Step 5: Solve for x
   x = 4,655,492,914.38/78,684.55
6. Step 6: Final answer
   x = 59,166.55