Finding the Fourth Proportional to 2,106.56, 2,908.40 and 1,885.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.56 : 2,908.40 = 1,885.12 : x
2. Step 2: Convert to fraction form
   2,106.56/2,908.40 = 1,885.12/x
3. Step 3: Cross multiply
   2,106.56x = 2,908.40 × 1,885.12
4. Step 4: Simplify right side
   2,106.56x = 5,482,666.31
5. Step 5: Solve for x
   x = 5,482,666.31/2,106.56
6. Step 6: Final answer
   x = 2,602.66