Finding the Fourth Proportional to 23,123.48, 31,910.30 and 12,513.30

Step by Step Solution

1. Step 1: Write the proportion equation
   23,123.48 : 31,910.30 = 12,513.30 : x
2. Step 2: Convert to fraction form
   23,123.48/31,910.30 = 12,513.30/x
3. Step 3: Cross multiply
   23,123.48x = 31,910.30 × 12,513.30
4. Step 4: Simplify right side
   23,123.48x = 399,303,156.99
5. Step 5: Solve for x
   x = 399,303,156.99/23,123.48
6. Step 6: Final answer
   x = 17,268.30