Finding the Fourth Proportional to 303,561.05, 455,300.01 and 90,361.87

Step by Step Solution

1. Step 1: Write the proportion equation
   303,561.05 : 455,300.01 = 90,361.87 : x
2. Step 2: Convert to fraction form
   303,561.05/455,300.01 = 90,361.87/x
3. Step 3: Cross multiply
   303,561.05x = 455,300.01 × 90,361.87
4. Step 4: Simplify right side
   303,561.05x = 41,141,759,176.37
5. Step 5: Solve for x
   x = 41,141,759,176.37/303,561.05
6. Step 6: Final answer
   x = 135,530.43