Finding the Fourth Proportional to 2,157.34, 2,978.40 and 1,360.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.34 : 2,978.40 = 1,360.84 : x
2. Step 2: Convert to fraction form
   2,157.34/2,978.40 = 1,360.84/x
3. Step 3: Cross multiply
   2,157.34x = 2,978.40 × 1,360.84
4. Step 4: Simplify right side
   2,157.34x = 4,053,125.86
5. Step 5: Solve for x
   x = 4,053,125.86/2,157.34
6. Step 6: Final answer
   x = 1,878.76