Finding the Third Proportional to 988,478.50 and 2,158,234.50

Step by Step Solution

1. Step 1: Write the proportion equation
   988,478.50 : 2,158,234.50 = 2,158,234.50 : x
2. Step 2: Convert to fraction form
   988,478.50/2,158,234.50 = 2,158,234.50/x
3. Step 3: Cross multiply
   988,478.50x = 2,158,234.50 × 2,158,234.50
4. Step 4: Simplify right side
   988,478.50x = 4,657,976,156,990.25
5. Step 5: Solve for x
   x = 4,657,976,156,990.25/988,478.50
6. Step 6: Final answer
   x = 4,712,268.56