Finding the Third Proportional to 143,977.50 and 287,985.38

Step by Step Solution

1. Step 1: Write the proportion equation
   143,977.50 : 287,985.38 = 287,985.38 : x
2. Step 2: Convert to fraction form
   143,977.50/287,985.38 = 287,985.38/x
3. Step 3: Cross multiply
   143,977.50x = 287,985.38 × 287,985.38
4. Step 4: Simplify right side
   143,977.50x = 82,935,576,213.89
5. Step 5: Solve for x
   x = 82,935,576,213.89/143,977.50
6. Step 6: Final answer
   x = 576,031.51