Finding the Fourth Proportional to 10,071.47, 15,091.67 and 5,392.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,071.47 : 15,091.67 = 5,392.10 : x
2. Step 2: Convert to fraction form
   10,071.47/15,091.67 = 5,392.10/x
3. Step 3: Cross multiply
   10,071.47x = 15,091.67 × 5,392.10
4. Step 4: Simplify right side
   10,071.47x = 81,375,793.81
5. Step 5: Solve for x
   x = 81,375,793.81/10,071.47
6. Step 6: Final answer
   x = 8,079.83