Finding the Fourth Proportional to 13,061.18, 19,578.37 and 5,160.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.18 : 19,578.37 = 5,160.50 : x
2. Step 2: Convert to fraction form
   13,061.18/19,578.37 = 5,160.50/x
3. Step 3: Cross multiply
   13,061.18x = 19,578.37 × 5,160.50
4. Step 4: Simplify right side
   13,061.18x = 101,034,178.39
5. Step 5: Solve for x
   x = 101,034,178.39/13,061.18
6. Step 6: Final answer
   x = 7,735.46