Finding the Fourth Proportional to 78,399.96, 108,192.15 and 42,589.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,399.96 : 108,192.15 = 42,589.68 : x
2. Step 2: Convert to fraction form
   78,399.96/108,192.15 = 42,589.68/x
3. Step 3: Cross multiply
   78,399.96x = 108,192.15 × 42,589.68
4. Step 4: Simplify right side
   78,399.96x = 4,607,869,047.01
5. Step 5: Solve for x
   x = 4,607,869,047.01/78,399.96
6. Step 6: Final answer
   x = 58,773.87