Finding the Fourth Proportional to 194,844, 268,884.72 and 105,420

Step by Step Solution

1. Step 1: Write the proportion equation
   194,844 : 268,884.72 = 105,420 : x
2. Step 2: Convert to fraction form
   194,844/268,884.72 = 105,420/x
3. Step 3: Cross multiply
   194,844x = 268,884.72 × 105,420
4. Step 4: Simplify right side
   194,844x = 28,345,827,182.40
5. Step 5: Solve for x
   x = 28,345,827,182.40/194,844
6. Step 6: Final answer
   x = 145,479.60