Finding the Fourth Proportional to 1,173,256.42, 1,619,116.78 and 765,619.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173,256.42 : 1,619,116.78 = 765,619.06 : x
2. Step 2: Convert to fraction form
   1,173,256.42/1,619,116.78 = 765,619.06/x
3. Step 3: Cross multiply
   1,173,256.42x = 1,619,116.78 × 765,619.06
4. Step 4: Simplify right side
   1,173,256.42x = 1,239,626,667,133.83
5. Step 5: Solve for x
   x = 1,239,626,667,133.83/1,173,256.42
6. Step 6: Final answer
   x = 1,056,569.26