Finding the Fourth Proportional to 1,214,980.10, 1,822,470.15 and 978,784.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,214,980.10 : 1,822,470.15 = 978,784.10 : x
2. Step 2: Convert to fraction form
   1,214,980.10/1,822,470.15 = 978,784.10/x
3. Step 3: Cross multiply
   1,214,980.10x = 1,822,470.15 × 978,784.10
4. Step 4: Simplify right side
   1,214,980.10x = 1,783,804,805,544.61
5. Step 5: Solve for x
   x = 1,783,804,805,544.61/1,214,980.10
6. Step 6: Final answer
   x = 1,468,176.15