Finding the Fourth Proportional to 2,071.47, 2,858.62 and 1,175.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.47 : 2,858.62 = 1,175.21 : x
2. Step 2: Convert to fraction form
   2,071.47/2,858.62 = 1,175.21/x
3. Step 3: Cross multiply
   2,071.47x = 2,858.62 × 1,175.21
4. Step 4: Simplify right side
   2,071.47x = 3,359,478.81
5. Step 5: Solve for x
   x = 3,359,478.81/2,071.47
6. Step 6: Final answer
   x = 1,621.78