Finding the Fourth Proportional to 57,513.64, 78,944.74 and 51,085.48

Step by Step Solution

1. Step 1: Write the proportion equation
   57,513.64 : 78,944.74 = 51,085.48 : x
2. Step 2: Convert to fraction form
   57,513.64/78,944.74 = 51,085.48/x
3. Step 3: Cross multiply
   57,513.64x = 78,944.74 × 51,085.48
4. Step 4: Simplify right side
   57,513.64x = 4,032,929,936.38
5. Step 5: Solve for x
   x = 4,032,929,936.38/57,513.64
6. Step 6: Final answer
   x = 70,121.28