Finding the Fourth Proportional to 78,057.70, 107,719.92 and 42,247.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,057.70 : 107,719.92 = 42,247.72 : x
2. Step 2: Convert to fraction form
   78,057.70/107,719.92 = 42,247.72/x
3. Step 3: Cross multiply
   78,057.70x = 107,719.92 × 42,247.72
4. Step 4: Simplify right side
   78,057.70x = 4,550,921,018.58
5. Step 5: Solve for x
   x = 4,550,921,018.58/78,057.70
6. Step 6: Final answer
   x = 58,302.01