Finding the Third Proportional to 131,499.63 and 287,602.63

Step by Step Solution

1. Step 1: Write the proportion equation
   131,499.63 : 287,602.63 = 287,602.63 : x
2. Step 2: Convert to fraction form
   131,499.63/287,602.63 = 287,602.63/x
3. Step 3: Cross multiply
   131,499.63x = 287,602.63 × 287,602.63
4. Step 4: Simplify right side
   131,499.63x = 82,715,269,906.89
5. Step 5: Solve for x
   x = 82,715,269,906.89/131,499.63
6. Step 6: Final answer
   x = 629,015.25