Finding the Third Proportional to 57,219.75 and 86,442.19

Step by Step Solution

1. Step 1: Write the proportion equation
   57,219.75 : 86,442.19 = 86,442.19 : x
2. Step 2: Convert to fraction form
   57,219.75/86,442.19 = 86,442.19/x
3. Step 3: Cross multiply
   57,219.75x = 86,442.19 × 86,442.19
4. Step 4: Simplify right side
   57,219.75x = 7,472,251,779.79
5. Step 5: Solve for x
   x = 7,472,251,779.79/57,219.75
6. Step 6: Final answer
   x = 130,588.68