Finding the Fourth Proportional to 66,221.28, 91,402.56 and 37,942.56

Step by Step Solution

1. Step 1: Write the proportion equation
   66,221.28 : 91,402.56 = 37,942.56 : x
2. Step 2: Convert to fraction form
   66,221.28/91,402.56 = 37,942.56/x
3. Step 3: Cross multiply
   66,221.28x = 91,402.56 × 37,942.56
4. Step 4: Simplify right side
   66,221.28x = 3,468,047,116.95
5. Step 5: Solve for x
   x = 3,468,047,116.95/66,221.28
6. Step 6: Final answer
   x = 52,370.58