Finding the Third Proportional to 590,517 and 916,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   590,517 : 916,123.50 = 916,123.50 : x
2. Step 2: Convert to fraction form
   590,517/916,123.50 = 916,123.50/x
3. Step 3: Cross multiply
   590,517x = 916,123.50 × 916,123.50
4. Step 4: Simplify right side
   590,517x = 839,282,267,252.25
5. Step 5: Solve for x
   x = 839,282,267,252.25/590,517
6. Step 6: Final answer
   x = 1,421,266.90