Finding the Fourth Proportional to 108,172.42, 162,316.72 and 45,036.12

Step by Step Solution

1. Step 1: Write the proportion equation
   108,172.42 : 162,316.72 = 45,036.12 : x
2. Step 2: Convert to fraction form
   108,172.42/162,316.72 = 45,036.12/x
3. Step 3: Cross multiply
   108,172.42x = 162,316.72 × 45,036.12
4. Step 4: Simplify right side
   108,172.42x = 7,310,115,279.93
5. Step 5: Solve for x
   x = 7,310,115,279.93/108,172.42
6. Step 6: Final answer
   x = 67,578.36