Finding the Fourth Proportional to 383,061.72, 528,620.18 and 210,976.41

Step by Step Solution

1. Step 1: Write the proportion equation
   383,061.72 : 528,620.18 = 210,976.41 : x
2. Step 2: Convert to fraction form
   383,061.72/528,620.18 = 210,976.41/x
3. Step 3: Cross multiply
   383,061.72x = 528,620.18 × 210,976.41
4. Step 4: Simplify right side
   383,061.72x = 111,526,386,775.07
5. Step 5: Solve for x
   x = 111,526,386,775.07/383,061.72
6. Step 6: Final answer
   x = 291,144.69