Finding the Fourth Proportional to 91,771.39, 137,641.56 and 25,196.05

Step by Step Solution

1. Step 1: Write the proportion equation
   91,771.39 : 137,641.56 = 25,196.05 : x
2. Step 2: Convert to fraction form
   91,771.39/137,641.56 = 25,196.05/x
3. Step 3: Cross multiply
   91,771.39x = 137,641.56 × 25,196.05
4. Step 4: Simplify right side
   91,771.39x = 3,468,023,627.84
5. Step 5: Solve for x
   x = 3,468,023,627.84/91,771.39
6. Step 6: Final answer
   x = 37,789.81