Finding the Fourth Proportional to 309,521.56, 464,350.56 and 99,180.76

Step by Step Solution

1. Step 1: Write the proportion equation
   309,521.56 : 464,350.56 = 99,180.76 : x
2. Step 2: Convert to fraction form
   309,521.56/464,350.56 = 99,180.76/x
3. Step 3: Cross multiply
   309,521.56x = 464,350.56 × 99,180.76
4. Step 4: Simplify right side
   309,521.56x = 46,054,641,447.23
5. Step 5: Solve for x
   x = 46,054,641,447.23/309,521.56
6. Step 6: Final answer
   x = 148,793.00