Finding the Fourth Proportional to 1,081.90, 1,623.03 and 533.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.90 : 1,623.03 = 533.98 : x
2. Step 2: Convert to fraction form
   1,081.90/1,623.03 = 533.98/x
3. Step 3: Cross multiply
   1,081.90x = 1,623.03 × 533.98
4. Step 4: Simplify right side
   1,081.90x = 866,665.56
5. Step 5: Solve for x
   x = 866,665.56/1,081.90
6. Step 6: Final answer
   x = 801.06