Finding the Fourth Proportional to 303,559.86, 455,297.00 and 190,896.60

Step by Step Solution

1. Step 1: Write the proportion equation
   303,559.86 : 455,297.00 = 190,896.60 : x
2. Step 2: Convert to fraction form
   303,559.86/455,297.00 = 190,896.60/x
3. Step 3: Cross multiply
   303,559.86x = 455,297.00 × 190,896.60
4. Step 4: Simplify right side
   303,559.86x = 86,914,648,335.72
5. Step 5: Solve for x
   x = 86,914,648,335.72/303,559.86
6. Step 6: Final answer
   x = 286,317.99