Finding the Third Proportional to 85,543.59 and 186,138

Step by Step Solution

1. Step 1: Write the proportion equation
   85,543.59 : 186,138 = 186,138 : x
2. Step 2: Convert to fraction form
   85,543.59/186,138 = 186,138/x
3. Step 3: Cross multiply
   85,543.59x = 186,138 × 186,138
4. Step 4: Simplify right side
   85,543.59x = 34,647,355,044
5. Step 5: Solve for x
   x = 34,647,355,044/85,543.59
6. Step 6: Final answer
   x = 405,025.71