Finding the Third Proportional to 698,670.50 and 988,818

Step by Step Solution

1. Step 1: Write the proportion equation
   698,670.50 : 988,818 = 988,818 : x
2. Step 2: Convert to fraction form
   698,670.50/988,818 = 988,818/x
3. Step 3: Cross multiply
   698,670.50x = 988,818 × 988,818
4. Step 4: Simplify right side
   698,670.50x = 977,761,037,124
5. Step 5: Solve for x
   x = 977,761,037,124/698,670.50
6. Step 6: Final answer
   x = 1,399,459.45