Finding the Fourth Proportional to 1,071.39, 1,477.53 and 822.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.39 : 1,477.53 = 822.72 : x
2. Step 2: Convert to fraction form
   1,071.39/1,477.53 = 822.72/x
3. Step 3: Cross multiply
   1,071.39x = 1,477.53 × 822.72
4. Step 4: Simplify right side
   1,071.39x = 1,215,593.48
5. Step 5: Solve for x
   x = 1,215,593.48/1,071.39
6. Step 6: Final answer
   x = 1,134.59