Finding the Fourth Proportional to 64,789.30, 89,410.71 and 36,111.91

Step by Step Solution

1. Step 1: Write the proportion equation
   64,789.30 : 89,410.71 = 36,111.91 : x
2. Step 2: Convert to fraction form
   64,789.30/89,410.71 = 36,111.91/x
3. Step 3: Cross multiply
   64,789.30x = 89,410.71 × 36,111.91
4. Step 4: Simplify right side
   64,789.30x = 3,228,790,884.94
5. Step 5: Solve for x
   x = 3,228,790,884.94/64,789.30
6. Step 6: Final answer
   x = 49,835.25