Finding the Fourth Proportional to 404,838.37, 606,592.89 and 138,453.55

Step by Step Solution

1. Step 1: Write the proportion equation
   404,838.37 : 606,592.89 = 138,453.55 : x
2. Step 2: Convert to fraction form
   404,838.37/606,592.89 = 138,453.55/x
3. Step 3: Cross multiply
   404,838.37x = 606,592.89 × 138,453.55
4. Step 4: Simplify right side
   404,838.37x = 83,984,939,025.26
5. Step 5: Solve for x
   x = 83,984,939,025.26/404,838.37
6. Step 6: Final answer
   x = 207,453.01