Finding the Fourth Proportional to 139,626.01, 207,859.71 and 138,795.63

Step by Step Solution

1. Step 1: Write the proportion equation
   139,626.01 : 207,859.71 = 138,795.63 : x
2. Step 2: Convert to fraction form
   139,626.01/207,859.71 = 138,795.63/x
3. Step 3: Cross multiply
   139,626.01x = 207,859.71 × 138,795.63
4. Step 4: Simplify right side
   139,626.01x = 28,850,019,401.07
5. Step 5: Solve for x
   x = 28,850,019,401.07/139,626.01
6. Step 6: Final answer
   x = 206,623.53