Finding the Fourth Proportional to 1,005.01, 1,507.61 and 355.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,005.01 : 1,507.61 = 355.59 : x
2. Step 2: Convert to fraction form
   1,005.01/1,507.61 = 355.59/x
3. Step 3: Cross multiply
   1,005.01x = 1,507.61 × 355.59
4. Step 4: Simplify right side
   1,005.01x = 536,091.93
5. Step 5: Solve for x
   x = 536,091.93/1,005.01
6. Step 6: Final answer
   x = 533.42