Finding the Fourth Proportional to 13,693.50, 18,897.04 and 7,405.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,693.50 : 18,897.04 = 7,405.88 : x
2. Step 2: Convert to fraction form
   13,693.50/18,897.04 = 7,405.88/x
3. Step 3: Cross multiply
   13,693.50x = 18,897.04 × 7,405.88
4. Step 4: Simplify right side
   13,693.50x = 139,949,210.60
5. Step 5: Solve for x
   x = 139,949,210.60/13,693.50
6. Step 6: Final answer
   x = 10,220.12