Finding the Fourth Proportional to 993,719.16, 1,490,369.76 and 319,860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   993,719.16 : 1,490,369.76 = 319,860.72 : x
2. Step 2: Convert to fraction form
   993,719.16/1,490,369.76 = 319,860.72/x
3. Step 3: Cross multiply
   993,719.16x = 1,490,369.76 × 319,860.72
4. Step 4: Simplify right side
   993,719.16x = 476,710,744,499.83
5. Step 5: Solve for x
   x = 476,710,744,499.83/993,719.16
6. Step 6: Final answer
   x = 479,723.81