Finding the Fourth Proportional to 129,142.89, 178,252.38 and 83,818.23

Step by Step Solution

1. Step 1: Write the proportion equation
   129,142.89 : 178,252.38 = 83,818.23 : x
2. Step 2: Convert to fraction form
   129,142.89/178,252.38 = 83,818.23/x
3. Step 3: Cross multiply
   129,142.89x = 178,252.38 × 83,818.23
4. Step 4: Simplify right side
   129,142.89x = 14,940,798,984.89
5. Step 5: Solve for x
   x = 14,940,798,984.89/129,142.89
6. Step 6: Final answer
   x = 115,692.00