Finding the Third Proportional to 191,642 and 403,143.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,642 : 403,143.50 = 403,143.50 : x
2. Step 2: Convert to fraction form
   191,642/403,143.50 = 403,143.50/x
3. Step 3: Cross multiply
   191,642x = 403,143.50 × 403,143.50
4. Step 4: Simplify right side
   191,642x = 162,524,681,592.25
5. Step 5: Solve for x
   x = 162,524,681,592.25/191,642
6. Step 6: Final answer
   x = 848,064.00