Finding the Third Proportional to 56,512.69 and 85,900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,512.69 : 85,900.50 = 85,900.50 : x
2. Step 2: Convert to fraction form
   56,512.69/85,900.50 = 85,900.50/x
3. Step 3: Cross multiply
   56,512.69x = 85,900.50 × 85,900.50
4. Step 4: Simplify right side
   56,512.69x = 7,378,895,900.25
5. Step 5: Solve for x
   x = 7,378,895,900.25/56,512.69
6. Step 6: Final answer
   x = 130,570.61