Finding the Fourth Proportional to 140,320.45, 210,563.74 and 51,636.25

Step by Step Solution

1. Step 1: Write the proportion equation
   140,320.45 : 210,563.74 = 51,636.25 : x
2. Step 2: Convert to fraction form
   140,320.45/210,563.74 = 51,636.25/x
3. Step 3: Cross multiply
   140,320.45x = 210,563.74 × 51,636.25
4. Step 4: Simplify right side
   140,320.45x = 10,872,722,316.89
5. Step 5: Solve for x
   x = 10,872,722,316.89/140,320.45
6. Step 6: Final answer
   x = 77,484.94