Finding the Fourth Proportional to 1,139,413.30, 1,706,867.15 and 999,330.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,413.30 : 1,706,867.15 = 999,330.10 : x
2. Step 2: Convert to fraction form
   1,139,413.30/1,706,867.15 = 999,330.10/x
3. Step 3: Cross multiply
   1,139,413.30x = 1,706,867.15 × 999,330.10
4. Step 4: Simplify right side
   1,139,413.30x = 1,705,723,719,696.22
5. Step 5: Solve for x
   x = 1,705,723,719,696.22/1,139,413.30
6. Step 6: Final answer
   x = 1,497,019.32