Finding the Fourth Proportional to 1,870.05, 2,805.17 and 553.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.05 : 2,805.17 = 553.82 : x
2. Step 2: Convert to fraction form
   1,870.05/2,805.17 = 553.82/x
3. Step 3: Cross multiply
   1,870.05x = 2,805.17 × 553.82
4. Step 4: Simplify right side
   1,870.05x = 1,553,542.45
5. Step 5: Solve for x
   x = 1,553,542.45/1,870.05
6. Step 6: Final answer
   x = 830.75