Finding the Fourth Proportional to 13,145.76, 19,726.72 and 7,610.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,145.76 : 19,726.72 = 7,610.08 : x
2. Step 2: Convert to fraction form
   13,145.76/19,726.72 = 7,610.08/x
3. Step 3: Cross multiply
   13,145.76x = 19,726.72 × 7,610.08
4. Step 4: Simplify right side
   13,145.76x = 150,121,917.34
5. Step 5: Solve for x
   x = 150,121,917.34/13,145.76
6. Step 6: Final answer
   x = 11,419.80