Finding the Fourth Proportional to 143,623.03, 215,532.96 and 50,128.78

Step by Step Solution

1. Step 1: Write the proportion equation
   143,623.03 : 215,532.96 = 50,128.78 : x
2. Step 2: Convert to fraction form
   143,623.03/215,532.96 = 50,128.78/x
3. Step 3: Cross multiply
   143,623.03x = 215,532.96 × 50,128.78
4. Step 4: Simplify right side
   143,623.03x = 10,804,404,334.59
5. Step 5: Solve for x
   x = 10,804,404,334.59/143,623.03
6. Step 6: Final answer
   x = 75,227.52