Finding the Fourth Proportional to 379,458.72, 523,663.52 and 209,703.52

Step by Step Solution

1. Step 1: Write the proportion equation
   379,458.72 : 523,663.52 = 209,703.52 : x
2. Step 2: Convert to fraction form
   379,458.72/523,663.52 = 209,703.52/x
3. Step 3: Cross multiply
   379,458.72x = 523,663.52 × 209,703.52
4. Step 4: Simplify right side
   379,458.72x = 109,814,083,439.59
5. Step 5: Solve for x
   x = 109,814,083,439.59/379,458.72
6. Step 6: Final answer
   x = 289,396.65