Finding the Fourth Proportional to 1,167.89, 1,751.54 and 345.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,167.89 : 1,751.54 = 345.98 : x
2. Step 2: Convert to fraction form
   1,167.89/1,751.54 = 345.98/x
3. Step 3: Cross multiply
   1,167.89x = 1,751.54 × 345.98
4. Step 4: Simplify right side
   1,167.89x = 605,992.55
5. Step 5: Solve for x
   x = 605,992.55/1,167.89
6. Step 6: Final answer
   x = 518.88