Finding the Third Proportional to 42,579 and 90,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,579 : 90,715.50 = 90,715.50 : x
2. Step 2: Convert to fraction form
   42,579/90,715.50 = 90,715.50/x
3. Step 3: Cross multiply
   42,579x = 90,715.50 × 90,715.50
4. Step 4: Simplify right side
   42,579x = 8,229,301,940.25
5. Step 5: Solve for x
   x = 8,229,301,940.25/42,579
6. Step 6: Final answer
   x = 193,271.38