Finding the Fourth Proportional to 65,089.32, 89,888.76 and 56,086.44

Step by Step Solution

1. Step 1: Write the proportion equation
   65,089.32 : 89,888.76 = 56,086.44 : x
2. Step 2: Convert to fraction form
   65,089.32/89,888.76 = 56,086.44/x
3. Step 3: Cross multiply
   65,089.32x = 89,888.76 × 56,086.44
4. Step 4: Simplify right side
   65,089.32x = 5,041,540,544.41
5. Step 5: Solve for x
   x = 5,041,540,544.41/65,089.32
6. Step 6: Final answer
   x = 77,455.73