Finding the Fourth Proportional to 12,861.51, 17,752.86 and 7,485.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861.51 : 17,752.86 = 7,485.54 : x
2. Step 2: Convert to fraction form
   12,861.51/17,752.86 = 7,485.54/x
3. Step 3: Cross multiply
   12,861.51x = 17,752.86 × 7,485.54
4. Step 4: Simplify right side
   12,861.51x = 132,889,743.64
5. Step 5: Solve for x
   x = 132,889,743.64/12,861.51
6. Step 6: Final answer
   x = 10,332.36