Finding the Fourth Proportional to 263,434.69, 363,536.72 and 142,573.10

Step by Step Solution

1. Step 1: Write the proportion equation
   263,434.69 : 363,536.72 = 142,573.10 : x
2. Step 2: Convert to fraction form
   263,434.69/363,536.72 = 142,573.10/x
3. Step 3: Cross multiply
   263,434.69x = 363,536.72 × 142,573.10
4. Step 4: Simplify right side
   263,434.69x = 51,830,557,134.23
5. Step 5: Solve for x
   x = 51,830,557,134.23/263,434.69
6. Step 6: Final answer
   x = 196,749.18