Finding the Fourth Proportional to 12,581.56, 17,346.54 and 7,864.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,581.56 : 17,346.54 = 7,864.12 : x
2. Step 2: Convert to fraction form
   12,581.56/17,346.54 = 7,864.12/x
3. Step 3: Cross multiply
   12,581.56x = 17,346.54 × 7,864.12
4. Step 4: Simplify right side
   12,581.56x = 136,415,272.14
5. Step 5: Solve for x
   x = 136,415,272.14/12,581.56
6. Step 6: Final answer
   x = 10,842.48