Finding the Third Proportional to 118,545 and 279,822.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,545 : 279,822.50 = 279,822.50 : x
2. Step 2: Convert to fraction form
   118,545/279,822.50 = 279,822.50/x
3. Step 3: Cross multiply
   118,545x = 279,822.50 × 279,822.50
4. Step 4: Simplify right side
   118,545x = 78,300,631,506.25
5. Step 5: Solve for x
   x = 78,300,631,506.25/118,545
6. Step 6: Final answer
   x = 660,513.99