Finding the Fourth Proportional to 13,457.43, 18,566.69 and 7,790.67

Step by Step Solution

1. Step 1: Write the proportion equation
   13,457.43 : 18,566.69 = 7,790.67 : x
2. Step 2: Convert to fraction form
   13,457.43/18,566.69 = 7,790.67/x
3. Step 3: Cross multiply
   13,457.43x = 18,566.69 × 7,790.67
4. Step 4: Simplify right side
   13,457.43x = 144,646,915.83
5. Step 5: Solve for x
   x = 144,646,915.83/13,457.43
6. Step 6: Final answer
   x = 10,748.48