Finding the Third Proportional to 420,553.31 and 912,093

Step by Step Solution

1. Step 1: Write the proportion equation
   420,553.31 : 912,093 = 912,093 : x
2. Step 2: Convert to fraction form
   420,553.31/912,093 = 912,093/x
3. Step 3: Cross multiply
   420,553.31x = 912,093 × 912,093
4. Step 4: Simplify right side
   420,553.31x = 831,913,640,649
5. Step 5: Solve for x
   x = 831,913,640,649/420,553.31
6. Step 6: Final answer
   x = 1,978,140.74