Finding the Fourth Proportional to 1,051.52, 1,447.88 and 931.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.52 : 1,447.88 = 931.78 : x
2. Step 2: Convert to fraction form
   1,051.52/1,447.88 = 931.78/x
3. Step 3: Cross multiply
   1,051.52x = 1,447.88 × 931.78
4. Step 4: Simplify right side
   1,051.52x = 1,349,105.63
5. Step 5: Solve for x
   x = 1,349,105.63/1,051.52
6. Step 6: Final answer
   x = 1,283.01