Finding the Fourth Proportional to 380,978.96, 571,394.57 and 362,012.18

Step by Step Solution

1. Step 1: Write the proportion equation
   380,978.96 : 571,394.57 = 362,012.18 : x
2. Step 2: Convert to fraction form
   380,978.96/571,394.57 = 362,012.18/x
3. Step 3: Cross multiply
   380,978.96x = 571,394.57 × 362,012.18
4. Step 4: Simplify right side
   380,978.96x = 206,851,789,258.83
5. Step 5: Solve for x
   x = 206,851,789,258.83/380,978.96
6. Step 6: Final answer
   x = 542,948.07