Finding the Third Proportional to 721,134.63 and 1,538,789.38

Step by Step Solution

1. Step 1: Write the proportion equation
   721,134.63 : 1,538,789.38 = 1,538,789.38 : x
2. Step 2: Convert to fraction form
   721,134.63/1,538,789.38 = 1,538,789.38/x
3. Step 3: Cross multiply
   721,134.63x = 1,538,789.38 × 1,538,789.38
4. Step 4: Simplify right side
   721,134.63x = 2,367,872,740,612.89
5. Step 5: Solve for x
   x = 2,367,872,740,612.89/721,134.63
6. Step 6: Final answer
   x = 3,283,537.72