Finding the Fourth Proportional to 66,491.78, 91,760.39 and 40,654.19

Step by Step Solution

1. Step 1: Write the proportion equation
   66,491.78 : 91,760.39 = 40,654.19 : x
2. Step 2: Convert to fraction form
   66,491.78/91,760.39 = 40,654.19/x
3. Step 3: Cross multiply
   66,491.78x = 91,760.39 × 40,654.19
4. Step 4: Simplify right side
   66,491.78x = 3,730,443,667.46
5. Step 5: Solve for x
   x = 3,730,443,667.46/66,491.78
6. Step 6: Final answer
   x = 56,103.84