Finding the Fourth Proportional to 139,083.60, 207,456.15 and 126,312.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,083.60 : 207,456.15 = 126,312.72 : x
2. Step 2: Convert to fraction form
   139,083.60/207,456.15 = 126,312.72/x
3. Step 3: Cross multiply
   139,083.60x = 207,456.15 × 126,312.72
4. Step 4: Simplify right side
   139,083.60x = 26,204,350,587.23
5. Step 5: Solve for x
   x = 26,204,350,587.23/139,083.60
6. Step 6: Final answer
   x = 188,407.19