Finding the Third Proportional to 42,915 and 61,912.13

Step by Step Solution

1. Step 1: Write the proportion equation
   42,915 : 61,912.13 = 61,912.13 : x
2. Step 2: Convert to fraction form
   42,915/61,912.13 = 61,912.13/x
3. Step 3: Cross multiply
   42,915x = 61,912.13 × 61,912.13
4. Step 4: Simplify right side
   42,915x = 3,833,111,222.02
5. Step 5: Solve for x
   x = 3,833,111,222.02/42,915
6. Step 6: Final answer
   x = 89,318.68