Finding the Fourth Proportional to 787,991.06, 1,182,265.86 and 388,911.98

Step by Step Solution

1. Step 1: Write the proportion equation
   787,991.06 : 1,182,265.86 = 388,911.98 : x
2. Step 2: Convert to fraction form
   787,991.06/1,182,265.86 = 388,911.98/x
3. Step 3: Cross multiply
   787,991.06x = 1,182,265.86 × 388,911.98
4. Step 4: Simplify right side
   787,991.06x = 459,797,356,499.00
5. Step 5: Solve for x
   x = 459,797,356,499.00/787,991.06
6. Step 6: Final answer
   x = 583,505.80