Finding the Fourth Proportional to 1,915.60, 2,875.32 and 1,290.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.60 : 2,875.32 = 1,290.82 : x
2. Step 2: Convert to fraction form
   1,915.60/2,875.32 = 1,290.82/x
3. Step 3: Cross multiply
   1,915.60x = 2,875.32 × 1,290.82
4. Step 4: Simplify right side
   1,915.60x = 3,711,520.56
5. Step 5: Solve for x
   x = 3,711,520.56/1,915.60
6. Step 6: Final answer
   x = 1,937.52