Finding the Third Proportional to 421,254 and 913,443.75

Step by Step Solution

1. Step 1: Write the proportion equation
   421,254 : 913,443.75 = 913,443.75 : x
2. Step 2: Convert to fraction form
   421,254/913,443.75 = 913,443.75/x
3. Step 3: Cross multiply
   421,254x = 913,443.75 × 913,443.75
4. Step 4: Simplify right side
   421,254x = 834,379,484,414.06
5. Step 5: Solve for x
   x = 834,379,484,414.06/421,254
6. Step 6: Final answer
   x = 1,980,704.00