Finding the Fourth Proportional to 1,523.81, 2,100.71 and 1,151.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,523.81 : 2,100.71 = 1,151.21 : x
2. Step 2: Convert to fraction form
   1,523.81/2,100.71 = 1,151.21/x
3. Step 3: Cross multiply
   1,523.81x = 2,100.71 × 1,151.21
4. Step 4: Simplify right side
   1,523.81x = 2,418,342.10
5. Step 5: Solve for x
   x = 2,418,342.10/1,523.81
6. Step 6: Final answer
   x = 1,587.04