Finding the Fourth Proportional to 1,931.91, 2,666.04 and 1,047.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.91 : 2,666.04 = 1,047.72 : x
2. Step 2: Convert to fraction form
   1,931.91/2,666.04 = 1,047.72/x
3. Step 3: Cross multiply
   1,931.91x = 2,666.04 × 1,047.72
4. Step 4: Simplify right side
   1,931.91x = 2,793,263.43
5. Step 5: Solve for x
   x = 2,793,263.43/1,931.91
6. Step 6: Final answer
   x = 1,445.86