Finding the Fourth Proportional to 139,431.72, 209,148.28 and 34,250.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,431.72 : 209,148.28 = 34,250.72 : x
2. Step 2: Convert to fraction form
   139,431.72/209,148.28 = 34,250.72/x
3. Step 3: Cross multiply
   139,431.72x = 209,148.28 × 34,250.72
4. Step 4: Simplify right side
   139,431.72x = 7,163,479,176.76
5. Step 5: Solve for x
   x = 7,163,479,176.76/139,431.72
6. Step 6: Final answer
   x = 51,376.25