Finding the Third Proportional to 290,425.50 and 625,345.31

Step by Step Solution

1. Step 1: Write the proportion equation
   290,425.50 : 625,345.31 = 625,345.31 : x
2. Step 2: Convert to fraction form
   290,425.50/625,345.31 = 625,345.31/x
3. Step 3: Cross multiply
   290,425.50x = 625,345.31 × 625,345.31
4. Step 4: Simplify right side
   290,425.50x = 391,056,759,865.72
5. Step 5: Solve for x
   x = 391,056,759,865.72/290,425.50
6. Step 6: Final answer
   x = 1,346,495.95