Finding the Fourth Proportional to 812,111.61, 1,120,700.45 and 449,527.69

Step by Step Solution

1. Step 1: Write the proportion equation
   812,111.61 : 1,120,700.45 = 449,527.69 : x
2. Step 2: Convert to fraction form
   812,111.61/1,120,700.45 = 449,527.69/x
3. Step 3: Cross multiply
   812,111.61x = 1,120,700.45 × 449,527.69
4. Step 4: Simplify right side
   812,111.61x = 503,785,876,619.32
5. Step 5: Solve for x
   x = 503,785,876,619.32/812,111.61
6. Step 6: Final answer
   x = 620,340.69