Finding the Fourth Proportional to 3,554.42, 4,903.89 and 2,156.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,554.42 : 4,903.89 = 2,156.90 : x
2. Step 2: Convert to fraction form
   3,554.42/4,903.89 = 2,156.90/x
3. Step 3: Cross multiply
   3,554.42x = 4,903.89 × 2,156.90
4. Step 4: Simplify right side
   3,554.42x = 10,577,200.34
5. Step 5: Solve for x
   x = 10,577,200.34/3,554.42
6. Step 6: Final answer
   x = 2,975.79