Finding the Fourth Proportional to 78,548.11, 108,397.50 and 42,738.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,548.11 : 108,397.50 = 42,738.15 : x
2. Step 2: Convert to fraction form
   78,548.11/108,397.50 = 42,738.15/x
3. Step 3: Cross multiply
   78,548.11x = 108,397.50 × 42,738.15
4. Step 4: Simplify right side
   78,548.11x = 4,632,708,614.63
5. Step 5: Solve for x
   x = 4,632,708,614.63/78,548.11
6. Step 6: Final answer
   x = 58,979.25