Finding the Third Proportional to 607,991 and 908,583.50

Step by Step Solution

1. Step 1: Write the proportion equation
   607,991 : 908,583.50 = 908,583.50 : x
2. Step 2: Convert to fraction form
   607,991/908,583.50 = 908,583.50/x
3. Step 3: Cross multiply
   607,991x = 908,583.50 × 908,583.50
4. Step 4: Simplify right side
   607,991x = 825,523,976,472.25
5. Step 5: Solve for x
   x = 825,523,976,472.25/607,991
6. Step 6: Final answer
   x = 1,357,789.80