Finding the Fourth Proportional to 111,036, 153,303.68 and 65,728.48

Step by Step Solution

1. Step 1: Write the proportion equation
   111,036 : 153,303.68 = 65,728.48 : x
2. Step 2: Convert to fraction form
   111,036/153,303.68 = 65,728.48/x
3. Step 3: Cross multiply
   111,036x = 153,303.68 × 65,728.48
4. Step 4: Simplify right side
   111,036x = 10,076,417,864.81
5. Step 5: Solve for x
   x = 10,076,417,864.81/111,036
6. Step 6: Final answer
   x = 90,749.11