Finding the Fourth Proportional to 778,667.76, 1,074,463.92 and 456,303.96

Step by Step Solution

1. Step 1: Write the proportion equation
   778,667.76 : 1,074,463.92 = 456,303.96 : x
2. Step 2: Convert to fraction form
   778,667.76/1,074,463.92 = 456,303.96/x
3. Step 3: Cross multiply
   778,667.76x = 1,074,463.92 × 456,303.96
4. Step 4: Simplify right side
   778,667.76x = 490,282,141,573.12
5. Step 5: Solve for x
   x = 490,282,141,573.12/778,667.76
6. Step 6: Final answer
   x = 629,642.28