Finding the Fourth Proportional to 65,886.12, 90,827.46 and 40,691.88

Step by Step Solution

1. Step 1: Write the proportion equation
   65,886.12 : 90,827.46 = 40,691.88 : x
2. Step 2: Convert to fraction form
   65,886.12/90,827.46 = 40,691.88/x
3. Step 3: Cross multiply
   65,886.12x = 90,827.46 × 40,691.88
4. Step 4: Simplify right side
   65,886.12x = 3,695,940,103.02
5. Step 5: Solve for x
   x = 3,695,940,103.02/65,886.12
6. Step 6: Final answer
   x = 56,095.88