Finding the Fourth Proportional to 1,229,443.01, 1,843,048.18 and 430,288.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229,443.01 : 1,843,048.18 = 430,288.61 : x
2. Step 2: Convert to fraction form
   1,229,443.01/1,843,048.18 = 430,288.61/x
3. Step 3: Cross multiply
   1,229,443.01x = 1,843,048.18 × 430,288.61
4. Step 4: Simplify right side
   1,229,443.01x = 793,042,630,857.85
5. Step 5: Solve for x
   x = 793,042,630,857.85/1,229,443.01
6. Step 6: Final answer
   x = 645,042.21