Finding the Fourth Proportional to 111,150.53, 153,345.86 and 72,931.17

Step by Step Solution

1. Step 1: Write the proportion equation
   111,150.53 : 153,345.86 = 72,931.17 : x
2. Step 2: Convert to fraction form
   111,150.53/153,345.86 = 72,931.17/x
3. Step 3: Cross multiply
   111,150.53x = 153,345.86 × 72,931.17
4. Step 4: Simplify right side
   111,150.53x = 11,183,692,619.80
5. Step 5: Solve for x
   x = 11,183,692,619.80/111,150.53
6. Step 6: Final answer
   x = 100,617.54