Finding the Fourth Proportional to 65,886.48, 90,886.46 and 39,002.79

Step by Step Solution

1. Step 1: Write the proportion equation
   65,886.48 : 90,886.46 = 39,002.79 : x
2. Step 2: Convert to fraction form
   65,886.48/90,886.46 = 39,002.79/x
3. Step 3: Cross multiply
   65,886.48x = 90,886.46 × 39,002.79
4. Step 4: Simplify right side
   65,886.48x = 3,544,825,318.21
5. Step 5: Solve for x
   x = 3,544,825,318.21/65,886.48
6. Step 6: Final answer
   x = 53,802.01