Finding the Fourth Proportional to 955,378.55, 1,433,145.89 and 272,318.00

Step by Step Solution

1. Step 1: Write the proportion equation
   955,378.55 : 1,433,145.89 = 272,318.00 : x
2. Step 2: Convert to fraction form
   955,378.55/1,433,145.89 = 272,318.00/x
3. Step 3: Cross multiply
   955,378.55x = 1,433,145.89 × 272,318.00
4. Step 4: Simplify right side
   955,378.55x = 390,271,413,945.70
5. Step 5: Solve for x
   x = 390,271,413,945.70/955,378.55
6. Step 6: Final answer
   x = 408,499.24