Finding the Fourth Proportional to 13,699.12, 18,904.77 and 7,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,699.12 : 18,904.77 = 7,411.50 : x
2. Step 2: Convert to fraction form
   13,699.12/18,904.77 = 7,411.50/x
3. Step 3: Cross multiply
   13,699.12x = 18,904.77 × 7,411.50
4. Step 4: Simplify right side
   13,699.12x = 140,112,702.86
5. Step 5: Solve for x
   x = 140,112,702.86/13,699.12
6. Step 6: Final answer
   x = 10,227.86