Finding the Fourth Proportional to 1,611.58, 2,223.90 and 948.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.58 : 2,223.90 = 948.50 : x
2. Step 2: Convert to fraction form
   1,611.58/2,223.90 = 948.50/x
3. Step 3: Cross multiply
   1,611.58x = 2,223.90 × 948.50
4. Step 4: Simplify right side
   1,611.58x = 2,109,369.15
5. Step 5: Solve for x
   x = 2,109,369.15/1,611.58
6. Step 6: Final answer
   x = 1,308.88