Finding the Fourth Proportional to 9,312.57, 12,851.37 and 5,063.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,312.57 : 12,851.37 = 5,063.63 : x
2. Step 2: Convert to fraction form
   9,312.57/12,851.37 = 5,063.63/x
3. Step 3: Cross multiply
   9,312.57x = 12,851.37 × 5,063.63
4. Step 4: Simplify right side
   9,312.57x = 65,074,574.09
5. Step 5: Solve for x
   x = 65,074,574.09/9,312.57
6. Step 6: Final answer
   x = 6,987.82