Finding the Fourth Proportional to 1,666.42, 2,500.71 and 693.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.42 : 2,500.71 = 693.22 : x
2. Step 2: Convert to fraction form
   1,666.42/2,500.71 = 693.22/x
3. Step 3: Cross multiply
   1,666.42x = 2,500.71 × 693.22
4. Step 4: Simplify right side
   1,666.42x = 1,733,542.19
5. Step 5: Solve for x
   x = 1,733,542.19/1,666.42
6. Step 6: Final answer
   x = 1,040.28