Finding the Fourth Proportional to 1,066.71, 1,601.55 and 847.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.71 : 1,601.55 = 847.47 : x
2. Step 2: Convert to fraction form
   1,066.71/1,601.55 = 847.47/x
3. Step 3: Cross multiply
   1,066.71x = 1,601.55 × 847.47
4. Step 4: Simplify right side
   1,066.71x = 1,357,265.58
5. Step 5: Solve for x
   x = 1,357,265.58/1,066.71
6. Step 6: Final answer
   x = 1,272.38