Finding the Fourth Proportional to 370,385.82, 511,105.91 and 217,430.25

Step by Step Solution

1. Step 1: Write the proportion equation
   370,385.82 : 511,105.91 = 217,430.25 : x
2. Step 2: Convert to fraction form
   370,385.82/511,105.91 = 217,430.25/x
3. Step 3: Cross multiply
   370,385.82x = 511,105.91 × 217,430.25
4. Step 4: Simplify right side
   370,385.82x = 111,129,885,787.78
5. Step 5: Solve for x
   x = 111,129,885,787.78/370,385.82
6. Step 6: Final answer
   x = 300,038.18