Finding the Third Proportional to 290,106.56 and 630,131.06

Step by Step Solution

1. Step 1: Write the proportion equation
   290,106.56 : 630,131.06 = 630,131.06 : x
2. Step 2: Convert to fraction form
   290,106.56/630,131.06 = 630,131.06/x
3. Step 3: Cross multiply
   290,106.56x = 630,131.06 × 630,131.06
4. Step 4: Simplify right side
   290,106.56x = 397,065,155,927.38
5. Step 5: Solve for x
   x = 397,065,155,927.38/290,106.56
6. Step 6: Final answer
   x = 1,368,687.26