Finding the Fourth Proportional to 23,499.06, 32,430.78 and 12,890.76

Step by Step Solution

1. Step 1: Write the proportion equation
   23,499.06 : 32,430.78 = 12,890.76 : x
2. Step 2: Convert to fraction form
   23,499.06/32,430.78 = 12,890.76/x
3. Step 3: Cross multiply
   23,499.06x = 32,430.78 × 12,890.76
4. Step 4: Simplify right side
   23,499.06x = 418,057,174.99
5. Step 5: Solve for x
   x = 418,057,174.99/23,499.06
6. Step 6: Final answer
   x = 17,790.38