Finding the Third Proportional to 78,003 and 121,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,003 : 121,003.50 = 121,003.50 : x
2. Step 2: Convert to fraction form
   78,003/121,003.50 = 121,003.50/x
3. Step 3: Cross multiply
   78,003x = 121,003.50 × 121,003.50
4. Step 4: Simplify right side
   78,003x = 14,641,847,012.25
5. Step 5: Solve for x
   x = 14,641,847,012.25/78,003
6. Step 6: Final answer
   x = 187,708.77