Finding the Fourth Proportional to 284,820.23, 426,856.59 and 209,588.10

Step by Step Solution

1. Step 1: Write the proportion equation
   284,820.23 : 426,856.59 = 209,588.10 : x
2. Step 2: Convert to fraction form
   284,820.23/426,856.59 = 209,588.10/x
3. Step 3: Cross multiply
   284,820.23x = 426,856.59 × 209,588.10
4. Step 4: Simplify right side
   284,820.23x = 89,464,061,670.58
5. Step 5: Solve for x
   x = 89,464,061,670.58/284,820.23
6. Step 6: Final answer
   x = 314,107.12