Finding the Fourth Proportional to 379,666.52, 523,950.72 and 209,911.56

Step by Step Solution

1. Step 1: Write the proportion equation
   379,666.52 : 523,950.72 = 209,911.56 : x
2. Step 2: Convert to fraction form
   379,666.52/523,950.72 = 209,911.56/x
3. Step 3: Cross multiply
   379,666.52x = 523,950.72 × 209,911.56
4. Step 4: Simplify right side
   379,666.52x = 109,983,312,998.32
5. Step 5: Solve for x
   x = 109,983,312,998.32/379,666.52
6. Step 6: Final answer
   x = 289,683.99