Finding the Fourth Proportional to 10,071.34, 15,091.48 and 5,391.97

Step by Step Solution

1. Step 1: Write the proportion equation
   10,071.34 : 15,091.48 = 5,391.97 : x
2. Step 2: Convert to fraction form
   10,071.34/15,091.48 = 5,391.97/x
3. Step 3: Cross multiply
   10,071.34x = 15,091.48 × 5,391.97
4. Step 4: Simplify right side
   10,071.34x = 81,372,807.42
5. Step 5: Solve for x
   x = 81,372,807.42/10,071.34
6. Step 6: Final answer
   x = 8,079.64