Finding the Fourth Proportional to 1,199,336.63, 1,807,096.69 and 990,776.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,199,336.63 : 1,807,096.69 = 990,776.79 : x
2. Step 2: Convert to fraction form
   1,199,336.63/1,807,096.69 = 990,776.79/x
3. Step 3: Cross multiply
   1,199,336.63x = 1,807,096.69 × 990,776.79
4. Step 4: Simplify right side
   1,199,336.63x = 1,790,429,452,783.94
5. Step 5: Solve for x
   x = 1,790,429,452,783.94/1,199,336.63
6. Step 6: Final answer
   x = 1,492,849.81