Finding the Fourth Proportional to 10,121.18, 13,967.51 and 5,645.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,121.18 : 13,967.51 = 5,645.52 : x
2. Step 2: Convert to fraction form
   10,121.18/13,967.51 = 5,645.52/x
3. Step 3: Cross multiply
   10,121.18x = 13,967.51 × 5,645.52
4. Step 4: Simplify right side
   10,121.18x = 78,853,828.83
5. Step 5: Solve for x
   x = 78,853,828.83/10,121.18
6. Step 6: Final answer
   x = 7,790.98