Finding the Fourth Proportional to 1,011,105.78, 1,516,689.72 and 442,194.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011,105.78 : 1,516,689.72 = 442,194.18 : x
2. Step 2: Convert to fraction form
   1,011,105.78/1,516,689.72 = 442,194.18/x
3. Step 3: Cross multiply
   1,011,105.78x = 1,516,689.72 × 442,194.18
4. Step 4: Simplify right side
   1,011,105.78x = 670,671,367,049.83
5. Step 5: Solve for x
   x = 670,671,367,049.83/1,011,105.78
6. Step 6: Final answer
   x = 663,304.85