Finding the Fourth Proportional to 321,649, 443,875.98 and 187,538.92

Step by Step Solution

1. Step 1: Write the proportion equation
   321,649 : 443,875.98 = 187,538.92 : x
2. Step 2: Convert to fraction form
   321,649/443,875.98 = 187,538.92/x
3. Step 3: Cross multiply
   321,649x = 443,875.98 × 187,538.92
4. Step 4: Simplify right side
   321,649x = 83,244,021,903.14
5. Step 5: Solve for x
   x = 83,244,021,903.14/321,649
6. Step 6: Final answer
   x = 258,803.92