Finding the Third Proportional to 900.94 and 1,988.72

Step by Step Solution

1. Step 1: Write the proportion equation
   900.94 : 1,988.72 = 1,988.72 : x
2. Step 2: Convert to fraction form
   900.94/1,988.72 = 1,988.72/x
3. Step 3: Cross multiply
   900.94x = 1,988.72 × 1,988.72
4. Step 4: Simplify right side
   900.94x = 3,955,002.27
5. Step 5: Solve for x
   x = 3,955,002.27/900.94
6. Step 6: Final answer
   x = 4,389.87