Finding the Fourth Proportional to 89,629.74, 123,686.46 and 51,388.02

Step by Step Solution

1. Step 1: Write the proportion equation
   89,629.74 : 123,686.46 = 51,388.02 : x
2. Step 2: Convert to fraction form
   89,629.74/123,686.46 = 51,388.02/x
3. Step 3: Cross multiply
   89,629.74x = 123,686.46 × 51,388.02
4. Step 4: Simplify right side
   89,629.74x = 6,356,002,280.21
5. Step 5: Solve for x
   x = 6,356,002,280.21/89,629.74
6. Step 6: Final answer
   x = 70,913.99