Finding the Fourth Proportional to 5,116.51, 7,061.41 and 2,878.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,116.51 : 7,061.41 = 2,878.48 : x
2. Step 2: Convert to fraction form
   5,116.51/7,061.41 = 2,878.48/x
3. Step 3: Cross multiply
   5,116.51x = 7,061.41 × 2,878.48
4. Step 4: Simplify right side
   5,116.51x = 20,326,127.46
5. Step 5: Solve for x
   x = 20,326,127.46/5,116.51
6. Step 6: Final answer
   x = 3,972.65