Finding the Fourth Proportional to 10,129.89, 13,979.13 and 5,654.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,129.89 : 13,979.13 = 5,654.75 : x
2. Step 2: Convert to fraction form
   10,129.89/13,979.13 = 5,654.75/x
3. Step 3: Cross multiply
   10,129.89x = 13,979.13 × 5,654.75
4. Step 4: Simplify right side
   10,129.89x = 79,048,415.47
5. Step 5: Solve for x
   x = 79,048,415.47/10,129.89
6. Step 6: Final answer
   x = 7,803.48