Finding the Fourth Proportional to 98,806.72, 136,340.46 and 56,362.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98,806.72 : 136,340.46 = 56,362.72 : x
2. Step 2: Convert to fraction form
   98,806.72/136,340.46 = 56,362.72/x
3. Step 3: Cross multiply
   98,806.72x = 136,340.46 × 56,362.72
4. Step 4: Simplify right side
   98,806.72x = 7,684,519,171.65
5. Step 5: Solve for x
   x = 7,684,519,171.65/98,806.72
6. Step 6: Final answer
   x = 77,773.24