Finding the Fourth Proportional to 13,061.75, 19,573.42 and 7,719.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.75 : 19,573.42 = 7,719.43 : x
2. Step 2: Convert to fraction form
   13,061.75/19,573.42 = 7,719.43/x
3. Step 3: Cross multiply
   13,061.75x = 19,573.42 × 7,719.43
4. Step 4: Simplify right side
   13,061.75x = 151,095,645.55
5. Step 5: Solve for x
   x = 151,095,645.55/13,061.75
6. Step 6: Final answer
   x = 11,567.79