Finding the Fourth Proportional to 13,695.45, 18,899.76 and 7,407.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,695.45 : 18,899.76 = 7,407.82 : x
2. Step 2: Convert to fraction form
   13,695.45/18,899.76 = 7,407.82/x
3. Step 3: Cross multiply
   13,695.45x = 18,899.76 × 7,407.82
4. Step 4: Simplify right side
   13,695.45x = 140,006,071.53
5. Step 5: Solve for x
   x = 140,006,071.53/13,695.45
6. Step 6: Final answer
   x = 10,222.82