Finding the Fourth Proportional to 155,786.67, 214,980.53 and 98,456.75

Step by Step Solution

1. Step 1: Write the proportion equation
   155,786.67 : 214,980.53 = 98,456.75 : x
2. Step 2: Convert to fraction form
   155,786.67/214,980.53 = 98,456.75/x
3. Step 3: Cross multiply
   155,786.67x = 214,980.53 × 98,456.75
4. Step 4: Simplify right side
   155,786.67x = 21,166,282,729.89
5. Step 5: Solve for x
   x = 21,166,282,729.89/155,786.67
6. Step 6: Final answer
   x = 135,867.10