Finding the Fourth Proportional to 812,145.96, 1,120,747.86 and 449,562.15

Step by Step Solution

1. Step 1: Write the proportion equation
   812,145.96 : 1,120,747.86 = 449,562.15 : x
2. Step 2: Convert to fraction form
   812,145.96/1,120,747.86 = 449,562.15/x
3. Step 3: Cross multiply
   812,145.96x = 1,120,747.86 × 449,562.15
4. Step 4: Simplify right side
   812,145.96x = 503,845,817,549.50
5. Step 5: Solve for x
   x = 503,845,817,549.50/812,145.96
6. Step 6: Final answer
   x = 620,388.26