Finding the Fourth Proportional to 194,636.10, 268,597.89 and 105,212.10

Step by Step Solution

1. Step 1: Write the proportion equation
   194,636.10 : 268,597.89 = 105,212.10 : x
2. Step 2: Convert to fraction form
   194,636.10/268,597.89 = 105,212.10/x
3. Step 3: Cross multiply
   194,636.10x = 268,597.89 × 105,212.10
4. Step 4: Simplify right side
   194,636.10x = 28,259,748,062.47
5. Step 5: Solve for x
   x = 28,259,748,062.47/194,636.10
6. Step 6: Final answer
   x = 145,192.74