Finding the Fourth Proportional to 403,443.40, 604,990.12 and 137,132.40

Step by Step Solution

1. Step 1: Write the proportion equation
   403,443.40 : 604,990.12 = 137,132.40 : x
2. Step 2: Convert to fraction form
   403,443.40/604,990.12 = 137,132.40/x
3. Step 3: Cross multiply
   403,443.40x = 604,990.12 × 137,132.40
4. Step 4: Simplify right side
   403,443.40x = 82,963,747,131.89
5. Step 5: Solve for x
   x = 82,963,747,131.89/403,443.40
6. Step 6: Final answer
   x = 205,639.12