Finding the Fourth Proportional to 65,506.10, 90,306.88 and 55,393.97

Step by Step Solution

1. Step 1: Write the proportion equation
   65,506.10 : 90,306.88 = 55,393.97 : x
2. Step 2: Convert to fraction form
   65,506.10/90,306.88 = 55,393.97/x
3. Step 3: Cross multiply
   65,506.10x = 90,306.88 × 55,393.97
4. Step 4: Simplify right side
   65,506.10x = 5,002,456,601.51
5. Step 5: Solve for x
   x = 5,002,456,601.51/65,506.10
6. Step 6: Final answer
   x = 76,366.27