Finding the Fourth Proportional to 383,143.69, 528,779.83 and 211,079.29

Step by Step Solution

1. Step 1: Write the proportion equation
   383,143.69 : 528,779.83 = 211,079.29 : x
2. Step 2: Convert to fraction form
   383,143.69/528,779.83 = 211,079.29/x
3. Step 3: Cross multiply
   383,143.69x = 528,779.83 × 211,079.29
4. Step 4: Simplify right side
   383,143.69x = 111,614,471,082.72
5. Step 5: Solve for x
   x = 111,614,471,082.72/383,143.69
6. Step 6: Final answer
   x = 291,312.30