Finding the Third Proportional to 55,268,071.50 and 86,688,648

Step by Step Solution

1. Step 1: Write the proportion equation
   55,268,071.50 : 86,688,648 = 86,688,648 : x
2. Step 2: Convert to fraction form
   55,268,071.50/86,688,648 = 86,688,648/x
3. Step 3: Cross multiply
   55,268,071.50x = 86,688,648 × 86,688,648
4. Step 4: Simplify right side
   55,268,071.50x = 7,514,921,692,067,904
5. Step 5: Solve for x
   x = 7,514,921,692,067,904/55,268,071.50
6. Step 6: Final answer
   x = 135,972,207.61