Finding the Fourth Proportional to 12,701.50, 17,528.16 and 7,112.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,701.50 : 17,528.16 = 7,112.50 : x
2. Step 2: Convert to fraction form
   12,701.50/17,528.16 = 7,112.50/x
3. Step 3: Cross multiply
   12,701.50x = 17,528.16 × 7,112.50
4. Step 4: Simplify right side
   12,701.50x = 124,669,038
5. Step 5: Solve for x
   x = 124,669,038/12,701.50
6. Step 6: Final answer
   x = 9,815.30