Finding the Third Proportional to 78,461.50 and 174,358.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,461.50 : 174,358.50 = 174,358.50 : x
2. Step 2: Convert to fraction form
   78,461.50/174,358.50 = 174,358.50/x
3. Step 3: Cross multiply
   78,461.50x = 174,358.50 × 174,358.50
4. Step 4: Simplify right side
   78,461.50x = 30,400,886,522.25
5. Step 5: Solve for x
   x = 30,400,886,522.25/78,461.50
6. Step 6: Final answer
   x = 387,462.47