Finding the Fourth Proportional to 488,112.10, 732,605.55 and 421,627.30

Step by Step Solution

1. Step 1: Write the proportion equation
   488,112.10 : 732,605.55 = 421,627.30 : x
2. Step 2: Convert to fraction form
   488,112.10/732,605.55 = 421,627.30/x
3. Step 3: Cross multiply
   488,112.10x = 732,605.55 × 421,627.30
4. Step 4: Simplify right side
   488,112.10x = 308,886,500,011.52
5. Step 5: Solve for x
   x = 308,886,500,011.52/488,112.10
6. Step 6: Final answer
   x = 632,818.77