Finding the Fourth Proportional to 1,820.39, 2,731.01 and 521.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.39 : 2,731.01 = 521.82 : x
2. Step 2: Convert to fraction form
   1,820.39/2,731.01 = 521.82/x
3. Step 3: Cross multiply
   1,820.39x = 2,731.01 × 521.82
4. Step 4: Simplify right side
   1,820.39x = 1,425,093.03
5. Step 5: Solve for x
   x = 1,425,093.03/1,820.39
6. Step 6: Final answer
   x = 782.85