Finding the Fourth Proportional to 65,921.58, 91,013.67 and 43,300.71

Step by Step Solution

1. Step 1: Write the proportion equation
   65,921.58 : 91,013.67 = 43,300.71 : x
2. Step 2: Convert to fraction form
   65,921.58/91,013.67 = 43,300.71/x
3. Step 3: Cross multiply
   65,921.58x = 91,013.67 × 43,300.71
4. Step 4: Simplify right side
   65,921.58x = 3,940,956,530.71
5. Step 5: Solve for x
   x = 3,940,956,530.71/65,921.58
6. Step 6: Final answer
   x = 59,782.50