Finding the Fourth Proportional to 2,215,555.80, 3,322,002.76 and 866,111.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215,555.80 : 3,322,002.76 = 866,111.19 : x
2. Step 2: Convert to fraction form
   2,215,555.80/3,322,002.76 = 866,111.19/x
3. Step 3: Cross multiply
   2,215,555.80x = 3,322,002.76 × 866,111.19
4. Step 4: Simplify right side
   2,215,555.80x = 2,877,223,763,646.88
5. Step 5: Solve for x
   x = 2,877,223,763,646.88/2,215,555.80
6. Step 6: Final answer
   x = 1,298,646.49