Finding the Third Proportional to 42,145.31 and 90,268.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,145.31 : 90,268.57 = 90,268.57 : x
2. Step 2: Convert to fraction form
   42,145.31/90,268.57 = 90,268.57/x
3. Step 3: Cross multiply
   42,145.31x = 90,268.57 × 90,268.57
4. Step 4: Simplify right side
   42,145.31x = 8,148,414,257.34
5. Step 5: Solve for x
   x = 8,148,414,257.34/42,145.31
6. Step 6: Final answer
   x = 193,340.94