Finding the Fourth Proportional to 7,870.88, 10,862.69 and 4,684.92

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.88 : 10,862.69 = 4,684.92 : x
2. Step 2: Convert to fraction form
   7,870.88/10,862.69 = 4,684.92/x
3. Step 3: Cross multiply
   7,870.88x = 10,862.69 × 4,684.92
4. Step 4: Simplify right side
   7,870.88x = 50,890,810.21
5. Step 5: Solve for x
   x = 50,890,810.21/7,870.88
6. Step 6: Final answer
   x = 6,465.71