Finding the Fourth Proportional to 65,019.60, 97,383.60 and 53,355.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,019.60 : 97,383.60 = 53,355.60 : x
2. Step 2: Convert to fraction form
   65,019.60/97,383.60 = 53,355.60/x
3. Step 3: Cross multiply
   65,019.60x = 97,383.60 × 53,355.60
4. Step 4: Simplify right side
   65,019.60x = 5,195,960,408.16
5. Step 5: Solve for x
   x = 5,195,960,408.16/65,019.60
6. Step 6: Final answer
   x = 79,913.76