Finding the Fourth Proportional to 542,136.55, 748,152.83 and 300,423.15

Step by Step Solution

1. Step 1: Write the proportion equation
   542,136.55 : 748,152.83 = 300,423.15 : x
2. Step 2: Convert to fraction form
   542,136.55/748,152.83 = 300,423.15/x
3. Step 3: Cross multiply
   542,136.55x = 748,152.83 × 300,423.15
4. Step 4: Simplify right side
   542,136.55x = 224,762,429,870.02
5. Step 5: Solve for x
   x = 224,762,429,870.02/542,136.55
6. Step 6: Final answer
   x = 414,586.38