Finding the Third Proportional to 42,892.31 and 61,877.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,892.31 : 61,877.81 = 61,877.81 : x
2. Step 2: Convert to fraction form
   42,892.31/61,877.81 = 61,877.81/x
3. Step 3: Cross multiply
   42,892.31x = 61,877.81 × 61,877.81
4. Step 4: Simplify right side
   42,892.31x = 3,828,863,679.79
5. Step 5: Solve for x
   x = 3,828,863,679.79/42,892.31
6. Step 6: Final answer
   x = 89,266.90