Finding the Fourth Proportional to 66,009.24, 91,097.94 and 55,743.72

Step by Step Solution

1. Step 1: Write the proportion equation
   66,009.24 : 91,097.94 = 55,743.72 : x
2. Step 2: Convert to fraction form
   66,009.24/91,097.94 = 55,743.72/x
3. Step 3: Cross multiply
   66,009.24x = 91,097.94 × 55,743.72
4. Step 4: Simplify right side
   66,009.24x = 5,078,138,059.94
5. Step 5: Solve for x
   x = 5,078,138,059.94/66,009.24
6. Step 6: Final answer
   x = 76,930.72