Finding the Fourth Proportional to 139,432.72, 209,149.78 and 34,251.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,432.72 : 209,149.78 = 34,251.72 : x
2. Step 2: Convert to fraction form
   139,432.72/209,149.78 = 34,251.72/x
3. Step 3: Cross multiply
   139,432.72x = 209,149.78 × 34,251.72
4. Step 4: Simplify right side
   139,432.72x = 7,163,739,702.62
5. Step 5: Solve for x
   x = 7,163,739,702.62/139,432.72
6. Step 6: Final answer
   x = 51,377.75