Finding the Fourth Proportional to 10,071.69, 15,116.94 and 5,144.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,071.69 : 15,116.94 = 5,144.87 : x
2. Step 2: Convert to fraction form
   10,071.69/15,116.94 = 5,144.87/x
3. Step 3: Cross multiply
   10,071.69x = 15,116.94 × 5,144.87
4. Step 4: Simplify right side
   10,071.69x = 77,774,615.51
5. Step 5: Solve for x
   x = 77,774,615.51/10,071.69
6. Step 6: Final answer
   x = 7,722.10