Finding the Third Proportional to 116,145 and 253,431

Step by Step Solution

1. Step 1: Write the proportion equation
   116,145 : 253,431 = 253,431 : x
2. Step 2: Convert to fraction form
   116,145/253,431 = 253,431/x
3. Step 3: Cross multiply
   116,145x = 253,431 × 253,431
4. Step 4: Simplify right side
   116,145x = 64,227,271,761
5. Step 5: Solve for x
   x = 64,227,271,761/116,145
6. Step 6: Final answer
   x = 552,992.14