Finding the Third Proportional to 660,030 and 991,500

Step by Step Solution

1. Step 1: Write the proportion equation
   660,030 : 991,500 = 991,500 : x
2. Step 2: Convert to fraction form
   660,030/991,500 = 991,500/x
3. Step 3: Cross multiply
   660,030x = 991,500 × 991,500
4. Step 4: Simplify right side
   660,030x = 983,072,250,000
5. Step 5: Solve for x
   x = 983,072,250,000/660,030
6. Step 6: Final answer
   x = 1,489,435.71