Finding the Third Proportional to 431,188 and 907,061

Step by Step Solution

1. Step 1: Write the proportion equation
   431,188 : 907,061 = 907,061 : x
2. Step 2: Convert to fraction form
   431,188/907,061 = 907,061/x
3. Step 3: Cross multiply
   431,188x = 907,061 × 907,061
4. Step 4: Simplify right side
   431,188x = 822,759,657,721
5. Step 5: Solve for x
   x = 822,759,657,721/431,188
6. Step 6: Final answer
   x = 1,908,122.81