Finding the Fourth Proportional to 1,610.31, 2,222.43 and 947.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.31 : 2,222.43 = 947.23 : x
2. Step 2: Convert to fraction form
   1,610.31/2,222.43 = 947.23/x
3. Step 3: Cross multiply
   1,610.31x = 2,222.43 × 947.23
4. Step 4: Simplify right side
   1,610.31x = 2,105,152.37
5. Step 5: Solve for x
   x = 2,105,152.37/1,610.31
6. Step 6: Final answer
   x = 1,307.30