Finding the Third Proportional to 291,147.75 and 636,271.88

Step by Step Solution

1. Step 1: Write the proportion equation
   291,147.75 : 636,271.88 = 636,271.88 : x
2. Step 2: Convert to fraction form
   291,147.75/636,271.88 = 636,271.88/x
3. Step 3: Cross multiply
   291,147.75x = 636,271.88 × 636,271.88
4. Step 4: Simplify right side
   291,147.75x = 404,841,898,916.02
5. Step 5: Solve for x
   x = 404,841,898,916.02/291,147.75
6. Step 6: Final answer
   x = 1,390,503.27