Finding the Fourth Proportional to 12,931.68, 17,847.65 and 7,898.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.68 : 17,847.65 = 7,898.79 : x
2. Step 2: Convert to fraction form
   12,931.68/17,847.65 = 7,898.79/x
3. Step 3: Cross multiply
   12,931.68x = 17,847.65 × 7,898.79
4. Step 4: Simplify right side
   12,931.68x = 140,974,839.34
5. Step 5: Solve for x
   x = 140,974,839.34/12,931.68
6. Step 6: Final answer
   x = 10,901.51