Finding the Third Proportional to 354,298.88 and 538,009.31

Step by Step Solution

1. Step 1: Write the proportion equation
   354,298.88 : 538,009.31 = 538,009.31 : x
2. Step 2: Convert to fraction form
   354,298.88/538,009.31 = 538,009.31/x
3. Step 3: Cross multiply
   354,298.88x = 538,009.31 × 538,009.31
4. Step 4: Simplify right side
   354,298.88x = 289,454,020,336.72
5. Step 5: Solve for x
   x = 289,454,020,336.72/354,298.88
6. Step 6: Final answer
   x = 816,976.97