Finding the Fourth Proportional to 990,426.86, 1,368,071.18 and 819,037.12

Step by Step Solution

1. Step 1: Write the proportion equation
   990,426.86 : 1,368,071.18 = 819,037.12 : x
2. Step 2: Convert to fraction form
   990,426.86/1,368,071.18 = 819,037.12/x
3. Step 3: Cross multiply
   990,426.86x = 1,368,071.18 × 819,037.12
4. Step 4: Simplify right side
   990,426.86x = 1,120,501,079,222.20
5. Step 5: Solve for x
   x = 1,120,501,079,222.20/990,426.86
6. Step 6: Final answer
   x = 1,131,331.47