Finding the Fourth Proportional to 65,897.82, 90,928.71 and 39,036.06

Step by Step Solution

1. Step 1: Write the proportion equation
   65,897.82 : 90,928.71 = 39,036.06 : x
2. Step 2: Convert to fraction form
   65,897.82/90,928.71 = 39,036.06/x
3. Step 3: Cross multiply
   65,897.82x = 90,928.71 × 39,036.06
4. Step 4: Simplify right side
   65,897.82x = 3,549,498,579.28
5. Step 5: Solve for x
   x = 3,549,498,579.28/65,897.82
6. Step 6: Final answer
   x = 53,863.67