Finding the Fourth Proportional to 1,870, 2,804.82 and 553.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870 : 2,804.82 = 553.69 : x
2. Step 2: Convert to fraction form
   1,870/2,804.82 = 553.69/x
3. Step 3: Cross multiply
   1,870x = 2,804.82 × 553.69
4. Step 4: Simplify right side
   1,870x = 1,553,000.79
5. Step 5: Solve for x
   x = 1,553,000.79/1,870
6. Step 6: Final answer
   x = 830.48