Finding the Fourth Proportional to 1,315.32, 1,971.61 and 535.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.32 : 1,971.61 = 535.01 : x
2. Step 2: Convert to fraction form
   1,315.32/1,971.61 = 535.01/x
3. Step 3: Cross multiply
   1,315.32x = 1,971.61 × 535.01
4. Step 4: Simplify right side
   1,315.32x = 1,054,837.67
5. Step 5: Solve for x
   x = 1,054,837.67/1,315.32
6. Step 6: Final answer
   x = 801.96