Finding the Fourth Proportional to 208,624.35, 287,901.61 and 113,131.12

Step by Step Solution

1. Step 1: Write the proportion equation
   208,624.35 : 287,901.61 = 113,131.12 : x
2. Step 2: Convert to fraction form
   208,624.35/287,901.61 = 113,131.12/x
3. Step 3: Cross multiply
   208,624.35x = 287,901.61 × 113,131.12
4. Step 4: Simplify right side
   208,624.35x = 32,570,631,023.45
5. Step 5: Solve for x
   x = 32,570,631,023.45/208,624.35
6. Step 6: Final answer
   x = 156,120.95