Finding the Fourth Proportional to 1,610.32, 2,222.55 and 947.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.32 : 2,222.55 = 947.74 : x
2. Step 2: Convert to fraction form
   1,610.32/2,222.55 = 947.74/x
3. Step 3: Cross multiply
   1,610.32x = 2,222.55 × 947.74
4. Step 4: Simplify right side
   1,610.32x = 2,106,383.69
5. Step 5: Solve for x
   x = 2,106,383.69/1,610.32
6. Step 6: Final answer
   x = 1,308.06