Finding the Fourth Proportional to 139,627.89, 207,862.52 and 138,797.51

Step by Step Solution

1. Step 1: Write the proportion equation
   139,627.89 : 207,862.52 = 138,797.51 : x
2. Step 2: Convert to fraction form
   139,627.89/207,862.52 = 138,797.51/x
3. Step 3: Cross multiply
   139,627.89x = 207,862.52 × 138,797.51
4. Step 4: Simplify right side
   139,627.89x = 28,850,798,465.03
5. Step 5: Solve for x
   x = 28,850,798,465.03/139,627.89
6. Step 6: Final answer
   x = 206,626.33