Finding the Fourth Proportional to 112,401.12, 155,238.72 and 87,212.04

Step by Step Solution

1. Step 1: Write the proportion equation
   112,401.12 : 155,238.72 = 87,212.04 : x
2. Step 2: Convert to fraction form
   112,401.12/155,238.72 = 87,212.04/x
3. Step 3: Cross multiply
   112,401.12x = 155,238.72 × 87,212.04
4. Step 4: Simplify right side
   112,401.12x = 13,538,685,458.19
5. Step 5: Solve for x
   x = 13,538,685,458.19/112,401.12
6. Step 6: Final answer
   x = 120,449.74