Finding the Fourth Proportional to 951,219.72, 1,312,648.38 and 521,490.42

Step by Step Solution

1. Step 1: Write the proportion equation
   951,219.72 : 1,312,648.38 = 521,490.42 : x
2. Step 2: Convert to fraction form
   951,219.72/1,312,648.38 = 521,490.42/x
3. Step 3: Cross multiply
   951,219.72x = 1,312,648.38 × 521,490.42
4. Step 4: Simplify right side
   951,219.72x = 684,533,554,998.52
5. Step 5: Solve for x
   x = 684,533,554,998.52/951,219.72
6. Step 6: Final answer
   x = 719,637.68