Finding the Fourth Proportional to 65,503.28, 90,302.96 and 55,391.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,503.28 : 90,302.96 = 55,391.12 : x
2. Step 2: Convert to fraction form
   65,503.28/90,302.96 = 55,391.12/x
3. Step 3: Cross multiply
   65,503.28x = 90,302.96 × 55,391.12
4. Step 4: Simplify right side
   65,503.28x = 5,001,982,093.72
5. Step 5: Solve for x
   x = 5,001,982,093.72/65,503.28
6. Step 6: Final answer
   x = 76,362.31