Finding the Fourth Proportional to 263,731.55, 363,947.78 and 142,870.03

Step by Step Solution

1. Step 1: Write the proportion equation
   263,731.55 : 363,947.78 = 142,870.03 : x
2. Step 2: Convert to fraction form
   263,731.55/363,947.78 = 142,870.03/x
3. Step 3: Cross multiply
   263,731.55x = 363,947.78 × 142,870.03
4. Step 4: Simplify right side
   263,731.55x = 51,997,229,694.34
5. Step 5: Solve for x
   x = 51,997,229,694.34/263,731.55
6. Step 6: Final answer
   x = 197,159.69