Finding the Fourth Proportional to 402,012.52, 554,755.62 and 223,153

Step by Step Solution

1. Step 1: Write the proportion equation
   402,012.52 : 554,755.62 = 223,153 : x
2. Step 2: Convert to fraction form
   402,012.52/554,755.62 = 223,153/x
3. Step 3: Cross multiply
   402,012.52x = 554,755.62 × 223,153
4. Step 4: Simplify right side
   402,012.52x = 123,795,380,869.86
5. Step 5: Solve for x
   x = 123,795,380,869.86/402,012.52
6. Step 6: Final answer
   x = 307,939.12