Finding the Fourth Proportional to 859,870.64, 1,278,980.38 and 856,993.52

Step by Step Solution

1. Step 1: Write the proportion equation
   859,870.64 : 1,278,980.38 = 856,993.52 : x
2. Step 2: Convert to fraction form
   859,870.64/1,278,980.38 = 856,993.52/x
3. Step 3: Cross multiply
   859,870.64x = 1,278,980.38 × 856,993.52
4. Step 4: Simplify right side
   859,870.64x = 1,096,077,897,867.14
5. Step 5: Solve for x
   x = 1,096,077,897,867.14/859,870.64
6. Step 6: Final answer
   x = 1,274,700.92