Finding the Fourth Proportional to 2,157.16, 2,978.43 and 1,492.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.16 : 2,978.43 = 1,492.86 : x
2. Step 2: Convert to fraction form
   2,157.16/2,978.43 = 1,492.86/x
3. Step 3: Cross multiply
   2,157.16x = 2,978.43 × 1,492.86
4. Step 4: Simplify right side
   2,157.16x = 4,446,379.01
5. Step 5: Solve for x
   x = 4,446,379.01/2,157.16
6. Step 6: Final answer
   x = 2,061.22