Finding the Fourth Proportional to 2,131.76, 2,924.50 and 2,111.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.76 : 2,924.50 = 2,111.60 : x
2. Step 2: Convert to fraction form
   2,131.76/2,924.50 = 2,111.60/x
3. Step 3: Cross multiply
   2,131.76x = 2,924.50 × 2,111.60
4. Step 4: Simplify right side
   2,131.76x = 6,175,374.20
5. Step 5: Solve for x
   x = 6,175,374.20/2,131.76
6. Step 6: Final answer
   x = 2,896.84