Finding the Fourth Proportional to 10,039.22, 15,072.62 and 5,112.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,039.22 : 15,072.62 = 5,112.18 : x
2. Step 2: Convert to fraction form
   10,039.22/15,072.62 = 5,112.18/x
3. Step 3: Cross multiply
   10,039.22x = 15,072.62 × 5,112.18
4. Step 4: Simplify right side
   10,039.22x = 77,053,946.51
5. Step 5: Solve for x
   x = 77,053,946.51/10,039.22
6. Step 6: Final answer
   x = 7,675.29