Finding the Third Proportional to 42,903.38 and 66,431.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,903.38 : 66,431.25 = 66,431.25 : x
2. Step 2: Convert to fraction form
   42,903.38/66,431.25 = 66,431.25/x
3. Step 3: Cross multiply
   42,903.38x = 66,431.25 × 66,431.25
4. Step 4: Simplify right side
   42,903.38x = 4,413,110,976.56
5. Step 5: Solve for x
   x = 4,413,110,976.56/42,903.38
6. Step 6: Final answer
   x = 102,861.63