Finding the Third Proportional to 290,047.50 and 448,191

Step by Step Solution

1. Step 1: Write the proportion equation
   290,047.50 : 448,191 = 448,191 : x
2. Step 2: Convert to fraction form
   290,047.50/448,191 = 448,191/x
3. Step 3: Cross multiply
   290,047.50x = 448,191 × 448,191
4. Step 4: Simplify right side
   290,047.50x = 200,875,172,481
5. Step 5: Solve for x
   x = 200,875,172,481/290,047.50
6. Step 6: Final answer
   x = 692,559.57