Finding the Fourth Proportional to 300,142.53, 450,100.80 and 122,554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,142.53 : 450,100.80 = 122,554.50 : x
2. Step 2: Convert to fraction form
   300,142.53/450,100.80 = 122,554.50/x
3. Step 3: Cross multiply
   300,142.53x = 450,100.80 × 122,554.50
4. Step 4: Simplify right side
   300,142.53x = 55,161,878,493.60
5. Step 5: Solve for x
   x = 55,161,878,493.60/300,142.53
6. Step 6: Final answer
   x = 183,785.61