Finding the Third Proportional to 358,588 and 772,501.50

Step by Step Solution

1. Step 1: Write the proportion equation
   358,588 : 772,501.50 = 772,501.50 : x
2. Step 2: Convert to fraction form
   358,588/772,501.50 = 772,501.50/x
3. Step 3: Cross multiply
   358,588x = 772,501.50 × 772,501.50
4. Step 4: Simplify right side
   358,588x = 596,758,567,502.25
5. Step 5: Solve for x
   x = 596,758,567,502.25/358,588
6. Step 6: Final answer
   x = 1,664,190.01