Finding the Third Proportional to 191,638.50 and 403,140

Step by Step Solution

1. Step 1: Write the proportion equation
   191,638.50 : 403,140 = 403,140 : x
2. Step 2: Convert to fraction form
   191,638.50/403,140 = 403,140/x
3. Step 3: Cross multiply
   191,638.50x = 403,140 × 403,140
4. Step 4: Simplify right side
   191,638.50x = 162,521,859,600
5. Step 5: Solve for x
   x = 162,521,859,600/191,638.50
6. Step 6: Final answer
   x = 848,064.77