Finding the Fourth Proportional to 91,469.86, 137,200.66 and 38,139.86

Step by Step Solution

1. Step 1: Write the proportion equation
   91,469.86 : 137,200.66 = 38,139.86 : x
2. Step 2: Convert to fraction form
   91,469.86/137,200.66 = 38,139.86/x
3. Step 3: Cross multiply
   91,469.86x = 137,200.66 × 38,139.86
4. Step 4: Simplify right side
   91,469.86x = 5,232,813,964.31
5. Step 5: Solve for x
   x = 5,232,813,964.31/91,469.86
6. Step 6: Final answer
   x = 57,208.07