Finding the Fourth Proportional to 208,870.45, 288,241.56 and 113,377.12

Step by Step Solution

1. Step 1: Write the proportion equation
   208,870.45 : 288,241.56 = 113,377.12 : x
2. Step 2: Convert to fraction form
   208,870.45/288,241.56 = 113,377.12/x
3. Step 3: Cross multiply
   208,870.45x = 288,241.56 × 113,377.12
4. Step 4: Simplify right side
   208,870.45x = 32,679,996,495.90
5. Step 5: Solve for x
   x = 32,679,996,495.90/208,870.45
6. Step 6: Final answer
   x = 156,460.61