Finding the Fourth Proportional to 1,611.52, 2,223.51 and 938.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.52 : 2,223.51 = 938.91 : x
2. Step 2: Convert to fraction form
   1,611.52/2,223.51 = 938.91/x
3. Step 3: Cross multiply
   1,611.52x = 2,223.51 × 938.91
4. Step 4: Simplify right side
   1,611.52x = 2,087,680.59
5. Step 5: Solve for x
   x = 2,087,680.59/1,611.52
6. Step 6: Final answer
   x = 1,295.47