Finding the Fourth Proportional to 648,200.30, 971,134.05 and 554,888.30

Step by Step Solution

1. Step 1: Write the proportion equation
   648,200.30 : 971,134.05 = 554,888.30 : x
2. Step 2: Convert to fraction form
   648,200.30/971,134.05 = 554,888.30/x
3. Step 3: Cross multiply
   648,200.30x = 971,134.05 × 554,888.30
4. Step 4: Simplify right side
   648,200.30x = 538,870,922,076.62
5. Step 5: Solve for x
   x = 538,870,922,076.62/648,200.30
6. Step 6: Final answer
   x = 831,333.96