Finding the Fourth Proportional to 868,591.59, 1,303,061.55 and 299,993.55

Step by Step Solution

1. Step 1: Write the proportion equation
   868,591.59 : 1,303,061.55 = 299,993.55 : x
2. Step 2: Convert to fraction form
   868,591.59/1,303,061.55 = 299,993.55/x
3. Step 3: Cross multiply
   868,591.59x = 1,303,061.55 × 299,993.55
4. Step 4: Simplify right side
   868,591.59x = 390,910,060,253.00
5. Step 5: Solve for x
   x = 390,910,060,253.00/868,591.59
6. Step 6: Final answer
   x = 450,050.48