Finding the Third Proportional to 42,665.50 and 58,813.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,665.50 : 58,813.50 = 58,813.50 : x
2. Step 2: Convert to fraction form
   42,665.50/58,813.50 = 58,813.50/x
3. Step 3: Cross multiply
   42,665.50x = 58,813.50 × 58,813.50
4. Step 4: Simplify right side
   42,665.50x = 3,459,027,782.25
5. Step 5: Solve for x
   x = 3,459,027,782.25/42,665.50
6. Step 6: Final answer
   x = 81,073.18