Finding the Fourth Proportional to 1,931.21, 2,665.11 and 1,047.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.21 : 2,665.11 = 1,047.05 : x
2. Step 2: Convert to fraction form
   1,931.21/2,665.11 = 1,047.05/x
3. Step 3: Cross multiply
   1,931.21x = 2,665.11 × 1,047.05
4. Step 4: Simplify right side
   1,931.21x = 2,790,490.10
5. Step 5: Solve for x
   x = 2,790,490.10/1,931.21
6. Step 6: Final answer
   x = 1,444.95