Finding the Fourth Proportional to 900,880.62, 1,243,215.37 and 492,982.55

Step by Step Solution

1. Step 1: Write the proportion equation
   900,880.62 : 1,243,215.37 = 492,982.55 : x
2. Step 2: Convert to fraction form
   900,880.62/1,243,215.37 = 492,982.55/x
3. Step 3: Cross multiply
   900,880.62x = 1,243,215.37 × 492,982.55
4. Step 4: Simplify right side
   900,880.62x = 612,883,477,085.72
5. Step 5: Solve for x
   x = 612,883,477,085.72/900,880.62
6. Step 6: Final answer
   x = 680,315.97