Finding the Fourth Proportional to 380,271.31, 524,774.56 and 208,200.43

Step by Step Solution

1. Step 1: Write the proportion equation
   380,271.31 : 524,774.56 = 208,200.43 : x
2. Step 2: Convert to fraction form
   380,271.31/524,774.56 = 208,200.43/x
3. Step 3: Cross multiply
   380,271.31x = 524,774.56 × 208,200.43
4. Step 4: Simplify right side
   380,271.31x = 109,258,286,911.83
5. Step 5: Solve for x
   x = 109,258,286,911.83/380,271.31
6. Step 6: Final answer
   x = 287,316.67