Finding the Fourth Proportional to 91,210.32, 136,836.54 and 28,880.82

Step by Step Solution

1. Step 1: Write the proportion equation
   91,210.32 : 136,836.54 = 28,880.82 : x
2. Step 2: Convert to fraction form
   91,210.32/136,836.54 = 28,880.82/x
3. Step 3: Cross multiply
   91,210.32x = 136,836.54 × 28,880.82
4. Step 4: Simplify right side
   91,210.32x = 3,951,951,481.16
5. Step 5: Solve for x
   x = 3,951,951,481.16/91,210.32
6. Step 6: Final answer
   x = 43,327.90