Finding the Fourth Proportional to 1,529.72, 2,111.16 and 940.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.72 : 2,111.16 = 940.64 : x
2. Step 2: Convert to fraction form
   1,529.72/2,111.16 = 940.64/x
3. Step 3: Cross multiply
   1,529.72x = 2,111.16 × 940.64
4. Step 4: Simplify right side
   1,529.72x = 1,985,841.54
5. Step 5: Solve for x
   x = 1,985,841.54/1,529.72
6. Step 6: Final answer
   x = 1,298.17