Finding the Fourth Proportional to 10,071.58, 15,114.94 and 5,145.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,071.58 : 15,114.94 = 5,145.34 : x
2. Step 2: Convert to fraction form
   10,071.58/15,114.94 = 5,145.34/x
3. Step 3: Cross multiply
   10,071.58x = 15,114.94 × 5,145.34
4. Step 4: Simplify right side
   10,071.58x = 77,771,505.38
5. Step 5: Solve for x
   x = 77,771,505.38/10,071.58
6. Step 6: Final answer
   x = 7,721.88