Finding the Fourth Proportional to 138,886.78, 207,116.18 and 123,577.78

Step by Step Solution

1. Step 1: Write the proportion equation
   138,886.78 : 207,116.18 = 123,577.78 : x
2. Step 2: Convert to fraction form
   138,886.78/207,116.18 = 123,577.78/x
3. Step 3: Cross multiply
   138,886.78x = 207,116.18 × 123,577.78
4. Step 4: Simplify right side
   138,886.78x = 25,594,957,726.48
5. Step 5: Solve for x
   x = 25,594,957,726.48/138,886.78
6. Step 6: Final answer
   x = 184,286.49