Finding the Fourth Proportional to 12,921.31, 17,833.06 and 7,884.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921.31 : 17,833.06 = 7,884.46 : x
2. Step 2: Convert to fraction form
   12,921.31/17,833.06 = 7,884.46/x
3. Step 3: Cross multiply
   12,921.31x = 17,833.06 × 7,884.46
4. Step 4: Simplify right side
   12,921.31x = 140,604,130.55
5. Step 5: Solve for x
   x = 140,604,130.55/12,921.31
6. Step 6: Final answer
   x = 10,881.57