Finding the Fourth Proportional to 348,123.30, 521,796.15 and 198,435.30

Step by Step Solution

1. Step 1: Write the proportion equation
   348,123.30 : 521,796.15 = 198,435.30 : x
2. Step 2: Convert to fraction form
   348,123.30/521,796.15 = 198,435.30/x
3. Step 3: Cross multiply
   348,123.30x = 521,796.15 × 198,435.30
4. Step 4: Simplify right side
   348,123.30x = 103,542,775,564.10
5. Step 5: Solve for x
   x = 103,542,775,564.10/348,123.30
6. Step 6: Final answer
   x = 297,431.33