Finding the Fourth Proportional to 98,620.32, 136,096.88 and 91,086.08

Step by Step Solution

1. Step 1: Write the proportion equation
   98,620.32 : 136,096.88 = 91,086.08 : x
2. Step 2: Convert to fraction form
   98,620.32/136,096.88 = 91,086.08/x
3. Step 3: Cross multiply
   98,620.32x = 136,096.88 × 91,086.08
4. Step 4: Simplify right side
   98,620.32x = 12,396,531,299.43
5. Step 5: Solve for x
   x = 12,396,531,299.43/98,620.32
6. Step 6: Final answer
   x = 125,699.56