Finding the Fourth Proportional to 64,728.84, 89,308.32 and 37,878

Step by Step Solution

1. Step 1: Write the proportion equation
   64,728.84 : 89,308.32 = 37,878 : x
2. Step 2: Convert to fraction form
   64,728.84/89,308.32 = 37,878/x
3. Step 3: Cross multiply
   64,728.84x = 89,308.32 × 37,878
4. Step 4: Simplify right side
   64,728.84x = 3,382,820,544.96
5. Step 5: Solve for x
   x = 3,382,820,544.96/64,728.84
6. Step 6: Final answer
   x = 52,261.41