Finding the Third Proportional to 57,479.63 and 85,865.06

Step by Step Solution

1. Step 1: Write the proportion equation
   57,479.63 : 85,865.06 = 85,865.06 : x
2. Step 2: Convert to fraction form
   57,479.63/85,865.06 = 85,865.06/x
3. Step 3: Cross multiply
   57,479.63x = 85,865.06 × 85,865.06
4. Step 4: Simplify right side
   57,479.63x = 7,372,808,958.13
5. Step 5: Solve for x
   x = 7,372,808,958.13/57,479.63
6. Step 6: Final answer
   x = 128,268.22