Finding the Third Proportional to 431,187 and 907,054.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,187 : 907,054.50 = 907,054.50 : x
2. Step 2: Convert to fraction form
   431,187/907,054.50 = 907,054.50/x
3. Step 3: Cross multiply
   431,187x = 907,054.50 × 907,054.50
4. Step 4: Simplify right side
   431,187x = 822,747,865,970.25
5. Step 5: Solve for x
   x = 822,747,865,970.25/431,187
6. Step 6: Final answer
   x = 1,908,099.89