Finding the Fourth Proportional to 208,796.13, 288,139.40 and 113,302.83

Step by Step Solution

1. Step 1: Write the proportion equation
   208,796.13 : 288,139.40 = 113,302.83 : x
2. Step 2: Convert to fraction form
   208,796.13/288,139.40 = 113,302.83/x
3. Step 3: Cross multiply
   208,796.13x = 288,139.40 × 113,302.83
4. Step 4: Simplify right side
   208,796.13x = 32,647,009,454.50
5. Step 5: Solve for x
   x = 32,647,009,454.50/208,796.13
6. Step 6: Final answer
   x = 156,358.31