Finding the Fourth Proportional to 23,730.70, 32,748.57 and 13,120.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,730.70 : 32,748.57 = 13,120.78 : x
2. Step 2: Convert to fraction form
   23,730.70/32,748.57 = 13,120.78/x
3. Step 3: Cross multiply
   23,730.70x = 32,748.57 × 13,120.78
4. Step 4: Simplify right side
   23,730.70x = 429,686,782.28
5. Step 5: Solve for x
   x = 429,686,782.28/23,730.70
6. Step 6: Final answer
   x = 18,106.79