Finding the Fourth Proportional to 12,931.54, 17,845.02 and 7,904.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.54 : 17,845.02 = 7,904.18 : x
2. Step 2: Convert to fraction form
   12,931.54/17,845.02 = 7,904.18/x
3. Step 3: Cross multiply
   12,931.54x = 17,845.02 × 7,904.18
4. Step 4: Simplify right side
   12,931.54x = 141,050,160.96
5. Step 5: Solve for x
   x = 141,050,160.96/12,931.54
6. Step 6: Final answer
   x = 10,907.45