Finding the Fourth Proportional to 812,111.86, 1,120,700.80 and 449,527.94

Step by Step Solution

1. Step 1: Write the proportion equation
   812,111.86 : 1,120,700.80 = 449,527.94 : x
2. Step 2: Convert to fraction form
   812,111.86/1,120,700.80 = 449,527.94/x
3. Step 3: Cross multiply
   812,111.86x = 1,120,700.80 × 449,527.94
4. Step 4: Simplify right side
   812,111.86x = 503,786,321,980.35
5. Step 5: Solve for x
   x = 503,786,321,980.35/812,111.86
6. Step 6: Final answer
   x = 620,341.05