Finding the Third Proportional to 116,139.50 and 254,423

Step by Step Solution

1. Step 1: Write the proportion equation
   116,139.50 : 254,423 = 254,423 : x
2. Step 2: Convert to fraction form
   116,139.50/254,423 = 254,423/x
3. Step 3: Cross multiply
   116,139.50x = 254,423 × 254,423
4. Step 4: Simplify right side
   116,139.50x = 64,731,062,929
5. Step 5: Solve for x
   x = 64,731,062,929/116,139.50
6. Step 6: Final answer
   x = 557,356.14