Finding the Fourth Proportional to 78,549.46, 108,397.76 and 42,739.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,549.46 : 108,397.76 = 42,739.61 : x
2. Step 2: Convert to fraction form
   78,549.46/108,397.76 = 42,739.61/x
3. Step 3: Cross multiply
   78,549.46x = 108,397.76 × 42,739.61
4. Step 4: Simplify right side
   78,549.46x = 4,632,877,987.27
5. Step 5: Solve for x
   x = 4,632,877,987.27/78,549.46
6. Step 6: Final answer
   x = 58,980.39