Finding the Fourth Proportional to 1,392,104.23, 1,921,156.53 and 780,268.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392,104.23 : 1,921,156.53 = 780,268.18 : x
2. Step 2: Convert to fraction form
   1,392,104.23/1,921,156.53 = 780,268.18/x
3. Step 3: Cross multiply
   1,392,104.23x = 1,921,156.53 × 780,268.18
4. Step 4: Simplify right side
   1,392,104.23x = 1,499,017,309,158.22
5. Step 5: Solve for x
   x = 1,499,017,309,158.22/1,392,104.23
6. Step 6: Final answer
   x = 1,076,799.62