Finding the Fourth Proportional to 12,969.23, 17,898.20 and 7,931.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,969.23 : 17,898.20 = 7,931.87 : x
2. Step 2: Convert to fraction form
   12,969.23/17,898.20 = 7,931.87/x
3. Step 3: Cross multiply
   12,969.23x = 17,898.20 × 7,931.87
4. Step 4: Simplify right side
   12,969.23x = 141,966,113.01
5. Step 5: Solve for x
   x = 141,966,113.01/12,969.23
6. Step 6: Final answer
   x = 10,946.38