Finding the Fourth Proportional to 639,271.72, 957,853.83 and 573,350.07

Step by Step Solution

1. Step 1: Write the proportion equation
   639,271.72 : 957,853.83 = 573,350.07 : x
2. Step 2: Convert to fraction form
   639,271.72/957,853.83 = 573,350.07/x
3. Step 3: Cross multiply
   639,271.72x = 957,853.83 × 573,350.07
4. Step 4: Simplify right side
   639,271.72x = 549,185,561,915.77
5. Step 5: Solve for x
   x = 549,185,561,915.77/639,271.72
6. Step 6: Final answer
   x = 859,080.02