Finding the Fourth Proportional to 9,320.98, 12,863.00 and 5,072.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,320.98 : 12,863.00 = 5,072.10 : x
2. Step 2: Convert to fraction form
   9,320.98/12,863.00 = 5,072.10/x
3. Step 3: Cross multiply
   9,320.98x = 12,863.00 × 5,072.10
4. Step 4: Simplify right side
   9,320.98x = 65,242,434.98
5. Step 5: Solve for x
   x = 65,242,434.98/9,320.98
6. Step 6: Final answer
   x = 6,999.53