Finding the Fourth Proportional to 78,211.14, 107,931.90 and 42,401.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,211.14 : 107,931.90 = 42,401.71 : x
2. Step 2: Convert to fraction form
   78,211.14/107,931.90 = 42,401.71/x
3. Step 3: Cross multiply
   78,211.14x = 107,931.90 × 42,401.71
4. Step 4: Simplify right side
   78,211.14x = 4,576,497,123.55
5. Step 5: Solve for x
   x = 4,576,497,123.55/78,211.14
6. Step 6: Final answer
   x = 58,514.65