Finding the Fourth Proportional to 5,111.48, 7,053.90 and 2,987.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.48 : 7,053.90 = 2,987.48 : x
2. Step 2: Convert to fraction form
   5,111.48/7,053.90 = 2,987.48/x
3. Step 3: Cross multiply
   5,111.48x = 7,053.90 × 2,987.48
4. Step 4: Simplify right side
   5,111.48x = 21,073,385.17
5. Step 5: Solve for x
   x = 21,073,385.17/5,111.48
6. Step 6: Final answer
   x = 4,122.76