Finding the Fourth Proportional to 144,312.80, 199,022.72 and 90,602.82

Step by Step Solution

1. Step 1: Write the proportion equation
   144,312.80 : 199,022.72 = 90,602.82 : x
2. Step 2: Convert to fraction form
   144,312.80/199,022.72 = 90,602.82/x
3. Step 3: Cross multiply
   144,312.80x = 199,022.72 × 90,602.82
4. Step 4: Simplify right side
   144,312.80x = 18,032,019,676.07
5. Step 5: Solve for x
   x = 18,032,019,676.07/144,312.80
6. Step 6: Final answer
   x = 124,950.94