Finding the Fourth Proportional to 103,178.10, 142,401.72 and 57,874.38

Step by Step Solution

1. Step 1: Write the proportion equation
   103,178.10 : 142,401.72 = 57,874.38 : x
2. Step 2: Convert to fraction form
   103,178.10/142,401.72 = 57,874.38/x
3. Step 3: Cross multiply
   103,178.10x = 142,401.72 × 57,874.38
4. Step 4: Simplify right side
   103,178.10x = 8,241,411,255.93
5. Step 5: Solve for x
   x = 8,241,411,255.93/103,178.10
6. Step 6: Final answer
   x = 79,875.59