Finding the Fourth Proportional to 137,391.49, 206,116.72 and 42,619.67

Step by Step Solution

1. Step 1: Write the proportion equation
   137,391.49 : 206,116.72 = 42,619.67 : x
2. Step 2: Convert to fraction form
   137,391.49/206,116.72 = 42,619.67/x
3. Step 3: Cross multiply
   137,391.49x = 206,116.72 × 42,619.67
4. Step 4: Simplify right side
   137,391.49x = 8,784,626,223.69
5. Step 5: Solve for x
   x = 8,784,626,223.69/137,391.49
6. Step 6: Final answer
   x = 63,938.65