Finding the Fourth Proportional to 65,117.20, 97,870.20 and 56,563.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,117.20 : 97,870.20 = 56,563.60 : x
2. Step 2: Convert to fraction form
   65,117.20/97,870.20 = 56,563.60/x
3. Step 3: Cross multiply
   65,117.20x = 97,870.20 × 56,563.60
4. Step 4: Simplify right side
   65,117.20x = 5,535,890,844.72
5. Step 5: Solve for x
   x = 5,535,890,844.72/65,117.20
6. Step 6: Final answer
   x = 85,014.26