Finding the Fourth Proportional to 1,174.98, 1,621.54 and 670.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174.98 : 1,621.54 = 670.98 : x
2. Step 2: Convert to fraction form
   1,174.98/1,621.54 = 670.98/x
3. Step 3: Cross multiply
   1,174.98x = 1,621.54 × 670.98
4. Step 4: Simplify right side
   1,174.98x = 1,088,017.55
5. Step 5: Solve for x
   x = 1,088,017.55/1,174.98
6. Step 6: Final answer
   x = 925.99