Finding the Fourth Proportional to 208,336.32, 312,454.72 and 89,942.88

Step by Step Solution

1. Step 1: Write the proportion equation
   208,336.32 : 312,454.72 = 89,942.88 : x
2. Step 2: Convert to fraction form
   208,336.32/312,454.72 = 89,942.88/x
3. Step 3: Cross multiply
   208,336.32x = 312,454.72 × 89,942.88
4. Step 4: Simplify right side
   208,336.32x = 28,103,077,386.39
5. Step 5: Solve for x
   x = 28,103,077,386.39/208,336.32
6. Step 6: Final answer
   x = 134,892.84