Finding the Fourth Proportional to 2,316.52, 3,196.90 and 1,385

Step by Step Solution

1. Step 1: Write the proportion equation
   2,316.52 : 3,196.90 = 1,385 : x
2. Step 2: Convert to fraction form
   2,316.52/3,196.90 = 1,385/x
3. Step 3: Cross multiply
   2,316.52x = 3,196.90 × 1,385
4. Step 4: Simplify right side
   2,316.52x = 4,427,706.50
5. Step 5: Solve for x
   x = 4,427,706.50/2,316.52
6. Step 6: Final answer
   x = 1,911.36