Finding the Fourth Proportional to 208,800.42, 288,145.35 and 113,307.12

Step by Step Solution

1. Step 1: Write the proportion equation
   208,800.42 : 288,145.35 = 113,307.12 : x
2. Step 2: Convert to fraction form
   208,800.42/288,145.35 = 113,307.12/x
3. Step 3: Cross multiply
   208,800.42x = 288,145.35 × 113,307.12
4. Step 4: Simplify right side
   208,800.42x = 32,648,919,749.89
5. Step 5: Solve for x
   x = 32,648,919,749.89/208,800.42
6. Step 6: Final answer
   x = 156,364.24