Finding the Third Proportional to 56,939.63 and 86,518.13

Step by Step Solution

1. Step 1: Write the proportion equation
   56,939.63 : 86,518.13 = 86,518.13 : x
2. Step 2: Convert to fraction form
   56,939.63/86,518.13 = 86,518.13/x
3. Step 3: Cross multiply
   56,939.63x = 86,518.13 × 86,518.13
4. Step 4: Simplify right side
   56,939.63x = 7,485,385,953.52
5. Step 5: Solve for x
   x = 7,485,385,953.52/56,939.63
6. Step 6: Final answer
   x = 131,461.81