Finding the Fourth Proportional to 23,123.99, 31,911.06 and 12,513.63

Step by Step Solution

1. Step 1: Write the proportion equation
   23,123.99 : 31,911.06 = 12,513.63 : x
2. Step 2: Convert to fraction form
   23,123.99/31,911.06 = 12,513.63/x
3. Step 3: Cross multiply
   23,123.99x = 31,911.06 × 12,513.63
4. Step 4: Simplify right side
   23,123.99x = 399,323,258.76
5. Step 5: Solve for x
   x = 399,323,258.76/23,123.99
6. Step 6: Final answer
   x = 17,268.79