Finding the Fourth Proportional to 404,391.85, 606,659.16 and 138,089.98

Step by Step Solution

1. Step 1: Write the proportion equation
   404,391.85 : 606,659.16 = 138,089.98 : x
2. Step 2: Convert to fraction form
   404,391.85/606,659.16 = 138,089.98/x
3. Step 3: Cross multiply
   404,391.85x = 606,659.16 × 138,089.98
4. Step 4: Simplify right side
   404,391.85x = 83,773,551,271.22
5. Step 5: Solve for x
   x = 83,773,551,271.22/404,391.85
6. Step 6: Final answer
   x = 207,159.35