Finding the Third Proportional to 31,074 and 45,139

Step by Step Solution

1. Step 1: Write the proportion equation
   31,074 : 45,139 = 45,139 : x
2. Step 2: Convert to fraction form
   31,074/45,139 = 45,139/x
3. Step 3: Cross multiply
   31,074x = 45,139 × 45,139
4. Step 4: Simplify right side
   31,074x = 2,037,529,321
5. Step 5: Solve for x
   x = 2,037,529,321/31,074
6. Step 6: Final answer
   x = 65,570.23