Finding the Fourth Proportional to 98,906.56, 147,640.37 and 91,597.12

Step by Step Solution

1. Step 1: Write the proportion equation
   98,906.56 : 147,640.37 = 91,597.12 : x
2. Step 2: Convert to fraction form
   98,906.56/147,640.37 = 91,597.12/x
3. Step 3: Cross multiply
   98,906.56x = 147,640.37 × 91,597.12
4. Step 4: Simplify right side
   98,906.56x = 13,523,432,687.73
5. Step 5: Solve for x
   x = 13,523,432,687.73/98,906.56
6. Step 6: Final answer
   x = 136,729.38