Finding the Third Proportional to 630,838.50 and 991,444.50

Step by Step Solution

1. Step 1: Write the proportion equation
   630,838.50 : 991,444.50 = 991,444.50 : x
2. Step 2: Convert to fraction form
   630,838.50/991,444.50 = 991,444.50/x
3. Step 3: Cross multiply
   630,838.50x = 991,444.50 × 991,444.50
4. Step 4: Simplify right side
   630,838.50x = 982,962,196,580.25
5. Step 5: Solve for x
   x = 982,962,196,580.25/630,838.50
6. Step 6: Final answer
   x = 1,558,183.59