Finding the Third Proportional to 56,289 and 87,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,289 : 87,124.50 = 87,124.50 : x
2. Step 2: Convert to fraction form
   56,289/87,124.50 = 87,124.50/x
3. Step 3: Cross multiply
   56,289x = 87,124.50 × 87,124.50
4. Step 4: Simplify right side
   56,289x = 7,590,678,500.25
5. Step 5: Solve for x
   x = 7,590,678,500.25/56,289
6. Step 6: Final answer
   x = 134,851.90