Finding the Fourth Proportional to 137,269.86, 189,435.61 and 76,839

Step by Step Solution

1. Step 1: Write the proportion equation
   137,269.86 : 189,435.61 = 76,839 : x
2. Step 2: Convert to fraction form
   137,269.86/189,435.61 = 76,839/x
3. Step 3: Cross multiply
   137,269.86x = 189,435.61 × 76,839
4. Step 4: Simplify right side
   137,269.86x = 14,556,042,836.79
5. Step 5: Solve for x
   x = 14,556,042,836.79/137,269.86
6. Step 6: Final answer
   x = 106,039.61