Finding the Fourth Proportional to 23,499.06, 32,429.72 and 13,428.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,499.06 : 32,429.72 = 13,428.28 : x
2. Step 2: Convert to fraction form
   23,499.06/32,429.72 = 13,428.28/x
3. Step 3: Cross multiply
   23,499.06x = 32,429.72 × 13,428.28
4. Step 4: Simplify right side
   23,499.06x = 435,475,359.06
5. Step 5: Solve for x
   x = 435,475,359.06/23,499.06
6. Step 6: Final answer
   x = 18,531.61