Finding the Fourth Proportional to 591,914.92, 817,064.72 and 387,978.98

Step by Step Solution

1. Step 1: Write the proportion equation
   591,914.92 : 817,064.72 = 387,978.98 : x
2. Step 2: Convert to fraction form
   591,914.92/817,064.72 = 387,978.98/x
3. Step 3: Cross multiply
   591,914.92x = 817,064.72 × 387,978.98
4. Step 4: Simplify right side
   591,914.92x = 317,003,936,659.59
5. Step 5: Solve for x
   x = 317,003,936,659.59/591,914.92
6. Step 6: Final answer
   x = 535,556.59