Finding the Third Proportional to 165,940.50 and 390,062.25

Step by Step Solution

1. Step 1: Write the proportion equation
   165,940.50 : 390,062.25 = 390,062.25 : x
2. Step 2: Convert to fraction form
   165,940.50/390,062.25 = 390,062.25/x
3. Step 3: Cross multiply
   165,940.50x = 390,062.25 × 390,062.25
4. Step 4: Simplify right side
   165,940.50x = 152,148,558,875.06
5. Step 5: Solve for x
   x = 152,148,558,875.06/165,940.50
6. Step 6: Final answer
   x = 916,886.23