Finding the Fourth Proportional to 65,786.58, 98,656.58 and 21,405.06

Step by Step Solution

1. Step 1: Write the proportion equation
   65,786.58 : 98,656.58 = 21,405.06 : x
2. Step 2: Convert to fraction form
   65,786.58/98,656.58 = 21,405.06/x
3. Step 3: Cross multiply
   65,786.58x = 98,656.58 × 21,405.06
4. Step 4: Simplify right side
   65,786.58x = 2,111,750,067.81
5. Step 5: Solve for x
   x = 2,111,750,067.81/65,786.58
6. Step 6: Final answer
   x = 32,100.01