Finding the Fourth Proportional to 13,061.32, 19,578.56 and 5,160.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.32 : 19,578.56 = 5,160.62 : x
2. Step 2: Convert to fraction form
   13,061.32/19,578.56 = 5,160.62/x
3. Step 3: Cross multiply
   13,061.32x = 19,578.56 × 5,160.62
4. Step 4: Simplify right side
   13,061.32x = 101,037,531.45
5. Step 5: Solve for x
   x = 101,037,531.45/13,061.32
6. Step 6: Final answer
   x = 7,735.63