Finding the Fourth Proportional to 12,967.77, 17,895.88 and 7,931.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,967.77 : 17,895.88 = 7,931.90 : x
2. Step 2: Convert to fraction form
   12,967.77/17,895.88 = 7,931.90/x
3. Step 3: Cross multiply
   12,967.77x = 17,895.88 × 7,931.90
4. Step 4: Simplify right side
   12,967.77x = 141,948,201.43
5. Step 5: Solve for x
   x = 141,948,201.43/12,967.77
6. Step 6: Final answer
   x = 10,946.23