Finding the Fourth Proportional to 13,695.47, 18,899.69 and 7,407.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,695.47 : 18,899.69 = 7,407.84 : x
2. Step 2: Convert to fraction form
   13,695.47/18,899.69 = 7,407.84/x
3. Step 3: Cross multiply
   13,695.47x = 18,899.69 × 7,407.84
4. Step 4: Simplify right side
   13,695.47x = 140,005,879.57
5. Step 5: Solve for x
   x = 140,005,879.57/13,695.47
6. Step 6: Final answer
   x = 10,222.79