Finding the Fourth Proportional to 1,528.72, 2,109.76 and 968.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.72 : 2,109.76 = 968.98 : x
2. Step 2: Convert to fraction form
   1,528.72/2,109.76 = 968.98/x
3. Step 3: Cross multiply
   1,528.72x = 2,109.76 × 968.98
4. Step 4: Simplify right side
   1,528.72x = 2,044,320.38
5. Step 5: Solve for x
   x = 2,044,320.38/1,528.72
6. Step 6: Final answer
   x = 1,337.28