Finding the Fourth Proportional to 256,499.82, 353,969.01 and 143,322.66

Step by Step Solution

1. Step 1: Write the proportion equation
   256,499.82 : 353,969.01 = 143,322.66 : x
2. Step 2: Convert to fraction form
   256,499.82/353,969.01 = 143,322.66/x
3. Step 3: Cross multiply
   256,499.82x = 353,969.01 × 143,322.66
4. Step 4: Simplify right side
   256,499.82x = 50,731,780,070.77
5. Step 5: Solve for x
   x = 50,731,780,070.77/256,499.82
6. Step 6: Final answer
   x = 197,784.86