Finding the Fourth Proportional to 1,666.07, 2,298.72 and 957.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.07 : 2,298.72 = 957.88 : x
2. Step 2: Convert to fraction form
   1,666.07/2,298.72 = 957.88/x
3. Step 3: Cross multiply
   1,666.07x = 2,298.72 × 957.88
4. Step 4: Simplify right side
   1,666.07x = 2,201,897.91
5. Step 5: Solve for x
   x = 2,201,897.91/1,666.07
6. Step 6: Final answer
   x = 1,321.61