Finding the Third Proportional to 388,036 and 579,663.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,036 : 579,663.50 = 579,663.50 : x
2. Step 2: Convert to fraction form
   388,036/579,663.50 = 579,663.50/x
3. Step 3: Cross multiply
   388,036x = 579,663.50 × 579,663.50
4. Step 4: Simplify right side
   388,036x = 336,009,773,232.25
5. Step 5: Solve for x
   x = 336,009,773,232.25/388,036
6. Step 6: Final answer
   x = 865,924.23