Finding the Fourth Proportional to 1,611.09, 2,222.89 and 947.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.09 : 2,222.89 = 947.81 : x
2. Step 2: Convert to fraction form
   1,611.09/2,222.89 = 947.81/x
3. Step 3: Cross multiply
   1,611.09x = 2,222.89 × 947.81
4. Step 4: Simplify right side
   1,611.09x = 2,106,889.02
5. Step 5: Solve for x
   x = 2,106,889.02/1,611.09
6. Step 6: Final answer
   x = 1,307.74