Finding the Third Proportional to 90,131 and 208,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,131 : 208,647.50 = 208,647.50 : x
2. Step 2: Convert to fraction form
   90,131/208,647.50 = 208,647.50/x
3. Step 3: Cross multiply
   90,131x = 208,647.50 × 208,647.50
4. Step 4: Simplify right side
   90,131x = 43,533,779,256.25
5. Step 5: Solve for x
   x = 43,533,779,256.25/90,131
6. Step 6: Final answer
   x = 483,005.62