Finding the Fourth Proportional to 139,627.52, 207,861.94 and 138,797.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,627.52 : 207,861.94 = 138,797.12 : x
2. Step 2: Convert to fraction form
   139,627.52/207,861.94 = 138,797.12/x
3. Step 3: Cross multiply
   139,627.52x = 207,861.94 × 138,797.12
4. Step 4: Simplify right side
   139,627.52x = 28,850,638,629.61
5. Step 5: Solve for x
   x = 28,850,638,629.61/139,627.52
6. Step 6: Final answer
   x = 206,625.73