Finding the Fourth Proportional to 66,667.52, 91,941.52 and 55,318.96

Step by Step Solution

1. Step 1: Write the proportion equation
   66,667.52 : 91,941.52 = 55,318.96 : x
2. Step 2: Convert to fraction form
   66,667.52/91,941.52 = 55,318.96/x
3. Step 3: Cross multiply
   66,667.52x = 91,941.52 × 55,318.96
4. Step 4: Simplify right side
   66,667.52x = 5,086,109,267.22
5. Step 5: Solve for x
   x = 5,086,109,267.22/66,667.52
6. Step 6: Final answer
   x = 76,290.66