Finding the Fourth Proportional to 1,148.21, 1,581.82 and 947.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.21 : 1,581.82 = 947.74 : x
2. Step 2: Convert to fraction form
   1,148.21/1,581.82 = 947.74/x
3. Step 3: Cross multiply
   1,148.21x = 1,581.82 × 947.74
4. Step 4: Simplify right side
   1,148.21x = 1,499,154.09
5. Step 5: Solve for x
   x = 1,499,154.09/1,148.21
6. Step 6: Final answer
   x = 1,305.64