Finding the Third Proportional to 915,775.50 and 1,989,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   915,775.50 : 1,989,109.50 = 1,989,109.50 : x
2. Step 2: Convert to fraction form
   915,775.50/1,989,109.50 = 1,989,109.50/x
3. Step 3: Cross multiply
   915,775.50x = 1,989,109.50 × 1,989,109.50
4. Step 4: Simplify right side
   915,775.50x = 3,956,556,602,990.25
5. Step 5: Solve for x
   x = 3,956,556,602,990.25/915,775.50
6. Step 6: Final answer
   x = 4,320,443.82