Finding the Third Proportional to 421,105.50 and 913,150.13

Step by Step Solution

1. Step 1: Write the proportion equation
   421,105.50 : 913,150.13 = 913,150.13 : x
2. Step 2: Convert to fraction form
   421,105.50/913,150.13 = 913,150.13/x
3. Step 3: Cross multiply
   421,105.50x = 913,150.13 × 913,150.13
4. Step 4: Simplify right side
   421,105.50x = 833,843,150,787.52
5. Step 5: Solve for x
   x = 833,843,150,787.52/421,105.50
6. Step 6: Final answer
   x = 1,980,128.85