Finding the Fourth Proportional to 65,089.84, 89,809.48 and 42,426.80

Step by Step Solution

1. Step 1: Write the proportion equation
   65,089.84 : 89,809.48 = 42,426.80 : x
2. Step 2: Convert to fraction form
   65,089.84/89,809.48 = 42,426.80/x
3. Step 3: Cross multiply
   65,089.84x = 89,809.48 × 42,426.80
4. Step 4: Simplify right side
   65,089.84x = 3,810,328,846.06
5. Step 5: Solve for x
   x = 3,810,328,846.06/65,089.84
6. Step 6: Final answer
   x = 58,539.53