Finding the Fourth Proportional to 13,699.52, 18,905.30 and 7,411.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,699.52 : 18,905.30 = 7,411.88 : x
2. Step 2: Convert to fraction form
   13,699.52/18,905.30 = 7,411.88/x
3. Step 3: Cross multiply
   13,699.52x = 18,905.30 × 7,411.88
4. Step 4: Simplify right side
   13,699.52x = 140,123,814.96
5. Step 5: Solve for x
   x = 140,123,814.96/13,699.52
6. Step 6: Final answer
   x = 10,228.37