Finding the Fourth Proportional to 921,648, 1,271,874.24 and 497,712

Step by Step Solution

1. Step 1: Write the proportion equation
   921,648 : 1,271,874.24 = 497,712 : x
2. Step 2: Convert to fraction form
   921,648/1,271,874.24 = 497,712/x
3. Step 3: Cross multiply
   921,648x = 1,271,874.24 × 497,712
4. Step 4: Simplify right side
   921,648x = 633,027,071,738.88
5. Step 5: Solve for x
   x = 633,027,071,738.88/921,648
6. Step 6: Final answer
   x = 686,842.56