Finding the Fourth Proportional to 139,572.74, 209,359.23 and 34,391.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,572.74 : 209,359.23 = 34,391.72 : x
2. Step 2: Convert to fraction form
   139,572.74/209,359.23 = 34,391.72/x
3. Step 3: Cross multiply
   139,572.74x = 209,359.23 × 34,391.72
4. Step 4: Simplify right side
   139,572.74x = 7,200,223,845.62
5. Step 5: Solve for x
   x = 7,200,223,845.62/139,572.74
6. Step 6: Final answer
   x = 51,587.61