Finding the Fourth Proportional to 78,189.68, 107,901.88 and 42,379.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,189.68 : 107,901.88 = 42,379.58 : x
2. Step 2: Convert to fraction form
   78,189.68/107,901.88 = 42,379.58/x
3. Step 3: Cross multiply
   78,189.68x = 107,901.88 × 42,379.58
4. Step 4: Simplify right side
   78,189.68x = 4,572,836,355.61
5. Step 5: Solve for x
   x = 4,572,836,355.61/78,189.68
6. Step 6: Final answer
   x = 58,483.89