Finding the Fourth Proportional to 12,719.93, 17,535.06 and 8,931.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.93 : 17,535.06 = 8,931.56 : x
2. Step 2: Convert to fraction form
   12,719.93/17,535.06 = 8,931.56/x
3. Step 3: Cross multiply
   12,719.93x = 17,535.06 × 8,931.56
4. Step 4: Simplify right side
   12,719.93x = 156,615,352.82
5. Step 5: Solve for x
   x = 156,615,352.82/12,719.93
6. Step 6: Final answer
   x = 12,312.60