Finding the Fourth Proportional to 11,475.02, 15,819.54 and 7,691.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,475.02 : 15,819.54 = 7,691.60 : x
2. Step 2: Convert to fraction form
   11,475.02/15,819.54 = 7,691.60/x
3. Step 3: Cross multiply
   11,475.02x = 15,819.54 × 7,691.60
4. Step 4: Simplify right side
   11,475.02x = 121,677,573.86
5. Step 5: Solve for x
   x = 121,677,573.86/11,475.02
6. Step 6: Final answer
   x = 10,603.69