Finding the Fourth Proportional to 10,079.40, 13,908.58 and 5,602.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,079.40 : 13,908.58 = 5,602.72 : x
2. Step 2: Convert to fraction form
   10,079.40/13,908.58 = 5,602.72/x
3. Step 3: Cross multiply
   10,079.40x = 13,908.58 × 5,602.72
4. Step 4: Simplify right side
   10,079.40x = 77,925,856.64
5. Step 5: Solve for x
   x = 77,925,856.64/10,079.40
6. Step 6: Final answer
   x = 7,731.20