Finding the Fourth Proportional to 817,983.42, 1,128,736.71 and 478,385.34

Step by Step Solution

1. Step 1: Write the proportion equation
   817,983.42 : 1,128,736.71 = 478,385.34 : x
2. Step 2: Convert to fraction form
   817,983.42/1,128,736.71 = 478,385.34/x
3. Step 3: Cross multiply
   817,983.42x = 1,128,736.71 × 478,385.34
4. Step 4: Simplify right side
   817,983.42x = 539,971,094,783.83
5. Step 5: Solve for x
   x = 539,971,094,783.83/817,983.42
6. Step 6: Final answer
   x = 660,124.74