Finding the Third Proportional to 290,785 and 437,633.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,785 : 437,633.50 = 437,633.50 : x
2. Step 2: Convert to fraction form
   290,785/437,633.50 = 437,633.50/x
3. Step 3: Cross multiply
   290,785x = 437,633.50 × 437,633.50
4. Step 4: Simplify right side
   290,785x = 191,523,080,322.25
5. Step 5: Solve for x
   x = 191,523,080,322.25/290,785
6. Step 6: Final answer
   x = 658,641.54