Finding the Fourth Proportional to 10,038.17, 15,066.44 and 5,111.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,038.17 : 15,066.44 = 5,111.21 : x
2. Step 2: Convert to fraction form
   10,038.17/15,066.44 = 5,111.21/x
3. Step 3: Cross multiply
   10,038.17x = 15,066.44 × 5,111.21
4. Step 4: Simplify right side
   10,038.17x = 77,007,738.79
5. Step 5: Solve for x
   x = 77,007,738.79/10,038.17
6. Step 6: Final answer
   x = 7,671.49