Finding the Fourth Proportional to 1,278,532.86, 1,917,300.81 and 479,377.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,532.86 : 1,917,300.81 = 479,377.98 : x
2. Step 2: Convert to fraction form
   1,278,532.86/1,917,300.81 = 479,377.98/x
3. Step 3: Cross multiply
   1,278,532.86x = 1,917,300.81 × 479,377.98
4. Step 4: Simplify right side
   1,278,532.86x = 919,111,789,350.16
5. Step 5: Solve for x
   x = 919,111,789,350.16/1,278,532.86
6. Step 6: Final answer
   x = 718,880.07