Finding the Fourth Proportional to 65,079.15, 89,782.73 and 42,409.88

Step by Step Solution

1. Step 1: Write the proportion equation
   65,079.15 : 89,782.73 = 42,409.88 : x
2. Step 2: Convert to fraction form
   65,079.15/89,782.73 = 42,409.88/x
3. Step 3: Cross multiply
   65,079.15x = 89,782.73 × 42,409.88
4. Step 4: Simplify right side
   65,079.15x = 3,807,674,144.41
5. Step 5: Solve for x
   x = 3,807,674,144.41/65,079.15
6. Step 6: Final answer
   x = 58,508.36