Finding the Fourth Proportional to 1,003.76, 1,386.32 and 847.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.76 : 1,386.32 = 847.71 : x
2. Step 2: Convert to fraction form
   1,003.76/1,386.32 = 847.71/x
3. Step 3: Cross multiply
   1,003.76x = 1,386.32 × 847.71
4. Step 4: Simplify right side
   1,003.76x = 1,175,200.16
5. Step 5: Solve for x
   x = 1,175,200.16/1,003.76
6. Step 6: Final answer
   x = 1,170.80