Finding the Fourth Proportional to 91,431.63, 137,081.82 and 38,812.41

Step by Step Solution

1. Step 1: Write the proportion equation
   91,431.63 : 137,081.82 = 38,812.41 : x
2. Step 2: Convert to fraction form
   91,431.63/137,081.82 = 38,812.41/x
3. Step 3: Cross multiply
   91,431.63x = 137,081.82 × 38,812.41
4. Step 4: Simplify right side
   91,431.63x = 5,320,475,801.39
5. Step 5: Solve for x
   x = 5,320,475,801.39/91,431.63
6. Step 6: Final answer
   x = 58,190.76