Finding the Fourth Proportional to 89,888.56, 134,846.88 and 39,986.08

Step by Step Solution

1. Step 1: Write the proportion equation
   89,888.56 : 134,846.88 = 39,986.08 : x
2. Step 2: Convert to fraction form
   89,888.56/134,846.88 = 39,986.08/x
3. Step 3: Cross multiply
   89,888.56x = 134,846.88 × 39,986.08
4. Step 4: Simplify right side
   89,888.56x = 5,391,998,131.43
5. Step 5: Solve for x
   x = 5,391,998,131.43/89,888.56
6. Step 6: Final answer
   x = 59,985.37