Finding the Fourth Proportional to 10,686.51, 14,747.63 and 5,970.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,686.51 : 14,747.63 = 5,970.78 : x
2. Step 2: Convert to fraction form
   10,686.51/14,747.63 = 5,970.78/x
3. Step 3: Cross multiply
   10,686.51x = 14,747.63 × 5,970.78
4. Step 4: Simplify right side
   10,686.51x = 88,054,824.40
5. Step 5: Solve for x
   x = 88,054,824.40/10,686.51
6. Step 6: Final answer
   x = 8,239.81