Finding the Fourth Proportional to 23,300.90, 32,155.61 and 12,690.53

Step by Step Solution

1. Step 1: Write the proportion equation
   23,300.90 : 32,155.61 = 12,690.53 : x
2. Step 2: Convert to fraction form
   23,300.90/32,155.61 = 12,690.53/x
3. Step 3: Cross multiply
   23,300.90x = 32,155.61 × 12,690.53
4. Step 4: Simplify right side
   23,300.90x = 408,071,733.37
5. Step 5: Solve for x
   x = 408,071,733.37/23,300.90
6. Step 6: Final answer
   x = 17,513.13