Finding the Fourth Proportional to 137,740.50, 190,081.89 and 78,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   137,740.50 : 190,081.89 = 78,124.50 : x
2. Step 2: Convert to fraction form
   137,740.50/190,081.89 = 78,124.50/x
3. Step 3: Cross multiply
   137,740.50x = 190,081.89 × 78,124.50
4. Step 4: Simplify right side
   137,740.50x = 14,850,052,615.31
5. Step 5: Solve for x
   x = 14,850,052,615.31/137,740.50
6. Step 6: Final answer
   x = 107,811.81