Finding the Fourth Proportional to 404,421.43, 606,632.34 and 138,184.55

Step by Step Solution

1. Step 1: Write the proportion equation
   404,421.43 : 606,632.34 = 138,184.55 : x
2. Step 2: Convert to fraction form
   404,421.43/606,632.34 = 138,184.55/x
3. Step 3: Cross multiply
   404,421.43x = 606,632.34 × 138,184.55
4. Step 4: Simplify right side
   404,421.43x = 83,827,216,918.35
5. Step 5: Solve for x
   x = 83,827,216,918.35/404,421.43
6. Step 6: Final answer
   x = 207,276.89