Finding the Fourth Proportional to 1,610.58, 2,222.72 and 947.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.58 : 2,222.72 = 947.19 : x
2. Step 2: Convert to fraction form
   1,610.58/2,222.72 = 947.19/x
3. Step 3: Cross multiply
   1,610.58x = 2,222.72 × 947.19
4. Step 4: Simplify right side
   1,610.58x = 2,105,338.16
5. Step 5: Solve for x
   x = 2,105,338.16/1,610.58
6. Step 6: Final answer
   x = 1,307.19