Finding the Third Proportional to 508,846.50 and 691,056

Step by Step Solution

1. Step 1: Write the proportion equation
   508,846.50 : 691,056 = 691,056 : x
2. Step 2: Convert to fraction form
   508,846.50/691,056 = 691,056/x
3. Step 3: Cross multiply
   508,846.50x = 691,056 × 691,056
4. Step 4: Simplify right side
   508,846.50x = 477,558,395,136
5. Step 5: Solve for x
   x = 477,558,395,136/508,846.50
6. Step 6: Final answer
   x = 938,511.70