Finding the Third Proportional to 56,289 and 89,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,289 : 89,131.50 = 89,131.50 : x
2. Step 2: Convert to fraction form
   56,289/89,131.50 = 89,131.50/x
3. Step 3: Cross multiply
   56,289x = 89,131.50 × 89,131.50
4. Step 4: Simplify right side
   56,289x = 7,944,424,292.25
5. Step 5: Solve for x
   x = 7,944,424,292.25/56,289
6. Step 6: Final answer
   x = 141,136.36