Finding the Fourth Proportional to 1,095.51, 1,642.84 and 401.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.51 : 1,642.84 = 401.98 : x
2. Step 2: Convert to fraction form
   1,095.51/1,642.84 = 401.98/x
3. Step 3: Cross multiply
   1,095.51x = 1,642.84 × 401.98
4. Step 4: Simplify right side
   1,095.51x = 660,388.82
5. Step 5: Solve for x
   x = 660,388.82/1,095.51
6. Step 6: Final answer
   x = 602.81