Finding the Fourth Proportional to 10,129.37, 13,979.23 and 5,653.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,129.37 : 13,979.23 = 5,653.99 : x
2. Step 2: Convert to fraction form
   10,129.37/13,979.23 = 5,653.99/x
3. Step 3: Cross multiply
   10,129.37x = 13,979.23 × 5,653.99
4. Step 4: Simplify right side
   10,129.37x = 79,038,501.09
5. Step 5: Solve for x
   x = 79,038,501.09/10,129.37
6. Step 6: Final answer
   x = 7,802.90