Finding the Third Proportional to 55,611.35 and 86,181.89

Step by Step Solution

1. Step 1: Write the proportion equation
   55,611.35 : 86,181.89 = 86,181.89 : x
2. Step 2: Convert to fraction form
   55,611.35/86,181.89 = 86,181.89/x
3. Step 3: Cross multiply
   55,611.35x = 86,181.89 × 86,181.89
4. Step 4: Simplify right side
   55,611.35x = 7,427,318,271.70
5. Step 5: Solve for x
   x = 7,427,318,271.70/55,611.35
6. Step 6: Final answer
   x = 133,557.59