Finding the Fourth Proportional to 381,123.72, 525,947.15 and 209,038.19

Step by Step Solution

1. Step 1: Write the proportion equation
   381,123.72 : 525,947.15 = 209,038.19 : x
2. Step 2: Convert to fraction form
   381,123.72/525,947.15 = 209,038.19/x
3. Step 3: Cross multiply
   381,123.72x = 525,947.15 × 209,038.19
4. Step 4: Simplify right side
   381,123.72x = 109,943,038,164.52
5. Step 5: Solve for x
   x = 109,943,038,164.52/381,123.72
6. Step 6: Final answer
   x = 288,470.73