Finding the Fourth Proportional to 263,746.17, 363,969.27 and 142,890.53

Step by Step Solution

1. Step 1: Write the proportion equation
   263,746.17 : 363,969.27 = 142,890.53 : x
2. Step 2: Convert to fraction form
   263,746.17/363,969.27 = 142,890.53/x
3. Step 3: Cross multiply
   263,746.17x = 363,969.27 × 142,890.53
4. Step 4: Simplify right side
   263,746.17x = 52,007,760,074.17
5. Step 5: Solve for x
   x = 52,007,760,074.17/263,746.17
6. Step 6: Final answer
   x = 197,188.68