Finding the Fourth Proportional to 10,439.98, 14,407.23 and 5,659.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,439.98 : 14,407.23 = 5,659.96 : x
2. Step 2: Convert to fraction form
   10,439.98/14,407.23 = 5,659.96/x
3. Step 3: Cross multiply
   10,439.98x = 14,407.23 × 5,659.96
4. Step 4: Simplify right side
   10,439.98x = 81,544,345.51
5. Step 5: Solve for x
   x = 81,544,345.51/10,439.98
6. Step 6: Final answer
   x = 7,810.78