Finding the Fourth Proportional to 921,948, 1,272,288.24 and 498,012

Step by Step Solution

1. Step 1: Write the proportion equation
   921,948 : 1,272,288.24 = 498,012 : x
2. Step 2: Convert to fraction form
   921,948/1,272,288.24 = 498,012/x
3. Step 3: Cross multiply
   921,948x = 1,272,288.24 × 498,012
4. Step 4: Simplify right side
   921,948x = 633,614,810,978.88
5. Step 5: Solve for x
   x = 633,614,810,978.88/921,948
6. Step 6: Final answer
   x = 687,256.56