Finding the Third Proportional to 55,621.69 and 86,199.19

Step by Step Solution

1. Step 1: Write the proportion equation
   55,621.69 : 86,199.19 = 86,199.19 : x
2. Step 2: Convert to fraction form
   55,621.69/86,199.19 = 86,199.19/x
3. Step 3: Cross multiply
   55,621.69x = 86,199.19 × 86,199.19
4. Step 4: Simplify right side
   55,621.69x = 7,430,299,925.66
5. Step 5: Solve for x
   x = 7,430,299,925.66/55,621.69
6. Step 6: Final answer
   x = 133,586.38