Finding the Third Proportional to 259,537.50 and 563,139

Step by Step Solution

1. Step 1: Write the proportion equation
   259,537.50 : 563,139 = 563,139 : x
2. Step 2: Convert to fraction form
   259,537.50/563,139 = 563,139/x
3. Step 3: Cross multiply
   259,537.50x = 563,139 × 563,139
4. Step 4: Simplify right side
   259,537.50x = 317,125,533,321
5. Step 5: Solve for x
   x = 317,125,533,321/259,537.50
6. Step 6: Final answer
   x = 1,221,887.14