Finding the Third Proportional to 192,364.50 and 420,120

Step by Step Solution

1. Step 1: Write the proportion equation
   192,364.50 : 420,120 = 420,120 : x
2. Step 2: Convert to fraction form
   192,364.50/420,120 = 420,120/x
3. Step 3: Cross multiply
   192,364.50x = 420,120 × 420,120
4. Step 4: Simplify right side
   192,364.50x = 176,500,814,400
5. Step 5: Solve for x
   x = 176,500,814,400/192,364.50
6. Step 6: Final answer
   x = 917,533.20