Finding the Fourth Proportional to 65,139.39, 89,885.16 and 38,290.32

Step by Step Solution

1. Step 1: Write the proportion equation
   65,139.39 : 89,885.16 = 38,290.32 : x
2. Step 2: Convert to fraction form
   65,139.39/89,885.16 = 38,290.32/x
3. Step 3: Cross multiply
   65,139.39x = 89,885.16 × 38,290.32
4. Step 4: Simplify right side
   65,139.39x = 3,441,731,539.65
5. Step 5: Solve for x
   x = 3,441,731,539.65/65,139.39
6. Step 6: Final answer
   x = 52,836.41