Finding the Fourth Proportional to 78,057.31, 107,719.08 and 42,247.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,057.31 : 107,719.08 = 42,247.32 : x
2. Step 2: Convert to fraction form
   78,057.31/107,719.08 = 42,247.32/x
3. Step 3: Cross multiply
   78,057.31x = 107,719.08 × 42,247.32
4. Step 4: Simplify right side
   78,057.31x = 4,550,842,442.87
5. Step 5: Solve for x
   x = 4,550,842,442.87/78,057.31
6. Step 6: Final answer
   x = 58,301.30