Finding the Third Proportional to 42,355.50 and 89,407.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,355.50 : 89,407.50 = 89,407.50 : x
2. Step 2: Convert to fraction form
   42,355.50/89,407.50 = 89,407.50/x
3. Step 3: Cross multiply
   42,355.50x = 89,407.50 × 89,407.50
4. Step 4: Simplify right side
   42,355.50x = 7,993,701,056.25
5. Step 5: Solve for x
   x = 7,993,701,056.25/42,355.50
6. Step 6: Final answer
   x = 188,728.76