Finding the Third Proportional to 186,313.50 and 402,138

Step by Step Solution

1. Step 1: Write the proportion equation
   186,313.50 : 402,138 = 402,138 : x
2. Step 2: Convert to fraction form
   186,313.50/402,138 = 402,138/x
3. Step 3: Cross multiply
   186,313.50x = 402,138 × 402,138
4. Step 4: Simplify right side
   186,313.50x = 161,714,971,044
5. Step 5: Solve for x
   x = 161,714,971,044/186,313.50
6. Step 6: Final answer
   x = 867,972.37