Finding the Third Proportional to 57,128.63 and 83,485.69

Step by Step Solution

1. Step 1: Write the proportion equation
   57,128.63 : 83,485.69 = 83,485.69 : x
2. Step 2: Convert to fraction form
   57,128.63/83,485.69 = 83,485.69/x
3. Step 3: Cross multiply
   57,128.63x = 83,485.69 × 83,485.69
4. Step 4: Simplify right side
   57,128.63x = 6,969,860,017.35
5. Step 5: Solve for x
   x = 6,969,860,017.35/57,128.63
6. Step 6: Final answer
   x = 122,002.94