Finding the Third Proportional to 78,465.50 and 174,366.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,465.50 : 174,366.50 = 174,366.50 : x
2. Step 2: Convert to fraction form
   78,465.50/174,366.50 = 174,366.50/x
3. Step 3: Cross multiply
   78,465.50x = 174,366.50 × 174,366.50
4. Step 4: Simplify right side
   78,465.50x = 30,403,676,322.25
5. Step 5: Solve for x
   x = 30,403,676,322.25/78,465.50
6. Step 6: Final answer
   x = 387,478.27