Finding the Third Proportional to 56,405.75 and 120,317.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,405.75 : 120,317.50 = 120,317.50 : x
2. Step 2: Convert to fraction form
   56,405.75/120,317.50 = 120,317.50/x
3. Step 3: Cross multiply
   56,405.75x = 120,317.50 × 120,317.50
4. Step 4: Simplify right side
   56,405.75x = 14,476,300,806.25
5. Step 5: Solve for x
   x = 14,476,300,806.25/56,405.75
6. Step 6: Final answer
   x = 256,645.83