Finding the Fourth Proportional to 64,784.90, 89,406.21 and 37,936.05

Step by Step Solution

1. Step 1: Write the proportion equation
   64,784.90 : 89,406.21 = 37,936.05 : x
2. Step 2: Convert to fraction form
   64,784.90/89,406.21 = 37,936.05/x
3. Step 3: Cross multiply
   64,784.90x = 89,406.21 × 37,936.05
4. Step 4: Simplify right side
   64,784.90x = 3,391,718,694.14
5. Step 5: Solve for x
   x = 3,391,718,694.14/64,784.90
6. Step 6: Final answer
   x = 52,353.54