Finding the Fourth Proportional to 799,664.27, 1,199,706.72 and 287,381.15

Step by Step Solution

1. Step 1: Write the proportion equation
   799,664.27 : 1,199,706.72 = 287,381.15 : x
2. Step 2: Convert to fraction form
   799,664.27/1,199,706.72 = 287,381.15/x
3. Step 3: Cross multiply
   799,664.27x = 1,199,706.72 × 287,381.15
4. Step 4: Simplify right side
   799,664.27x = 344,773,094,279.02
5. Step 5: Solve for x
   x = 344,773,094,279.02/799,664.27
6. Step 6: Final answer
   x = 431,147.31