Finding the Third Proportional to 42,099.75 and 61,899.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,099.75 : 61,899.75 = 61,899.75 : x
2. Step 2: Convert to fraction form
   42,099.75/61,899.75 = 61,899.75/x
3. Step 3: Cross multiply
   42,099.75x = 61,899.75 × 61,899.75
4. Step 4: Simplify right side
   42,099.75x = 3,831,579,050.06
5. Step 5: Solve for x
   x = 3,831,579,050.06/42,099.75
6. Step 6: Final answer
   x = 91,011.92