Finding the Fourth Proportional to 1,240,271.10, 1,857,158.82 and 812,461.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,240,271.10 : 1,857,158.82 = 812,461.50 : x
2. Step 2: Convert to fraction form
   1,240,271.10/1,857,158.82 = 812,461.50/x
3. Step 3: Cross multiply
   1,240,271.10x = 1,857,158.82 × 812,461.50
4. Step 4: Simplify right side
   1,240,271.10x = 1,508,870,040,635.43
5. Step 5: Solve for x
   x = 1,508,870,040,635.43/1,240,271.10
6. Step 6: Final answer
   x = 1,216,564.70