Finding the Fourth Proportional to 1,116,784.56, 1,670,949.55 and 661,620.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116,784.56 : 1,670,949.55 = 661,620.19 : x
2. Step 2: Convert to fraction form
   1,116,784.56/1,670,949.55 = 661,620.19/x
3. Step 3: Cross multiply
   1,116,784.56x = 1,670,949.55 × 661,620.19
4. Step 4: Simplify right side
   1,116,784.56x = 1,105,533,947,088.57
5. Step 5: Solve for x
   x = 1,105,533,947,088.57/1,116,784.56
6. Step 6: Final answer
   x = 989,925.89