Finding the Fourth Proportional to 13,904.86, 19,188.52 and 7,617.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,904.86 : 19,188.52 = 7,617.28 : x
2. Step 2: Convert to fraction form
   13,904.86/19,188.52 = 7,617.28/x
3. Step 3: Cross multiply
   13,904.86x = 19,188.52 × 7,617.28
4. Step 4: Simplify right side
   13,904.86x = 146,164,329.63
5. Step 5: Solve for x
   x = 146,164,329.63/13,904.86
6. Step 6: Final answer
   x = 10,511.74