Finding the Fourth Proportional to 12,931.46, 17,847.34 and 7,898.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.46 : 17,847.34 = 7,898.60 : x
2. Step 2: Convert to fraction form
   12,931.46/17,847.34 = 7,898.60/x
3. Step 3: Cross multiply
   12,931.46x = 17,847.34 × 7,898.60
4. Step 4: Simplify right side
   12,931.46x = 140,968,999.72
5. Step 5: Solve for x
   x = 140,968,999.72/12,931.46
6. Step 6: Final answer
   x = 10,901.24