Finding the Fourth Proportional to 112,535.31, 155,225.52 and 72,185.16

Step by Step Solution

1. Step 1: Write the proportion equation
   112,535.31 : 155,225.52 = 72,185.16 : x
2. Step 2: Convert to fraction form
   112,535.31/155,225.52 = 72,185.16/x
3. Step 3: Cross multiply
   112,535.31x = 155,225.52 × 72,185.16
4. Step 4: Simplify right side
   112,535.31x = 11,204,978,997.28
5. Step 5: Solve for x
   x = 11,204,978,997.28/112,535.31
6. Step 6: Final answer
   x = 99,568.56