Finding the Fourth Proportional to 144,259.95, 199,075.82 and 87,689.55

Step by Step Solution

1. Step 1: Write the proportion equation
   144,259.95 : 199,075.82 = 87,689.55 : x
2. Step 2: Convert to fraction form
   144,259.95/199,075.82 = 87,689.55/x
3. Step 3: Cross multiply
   144,259.95x = 199,075.82 × 87,689.55
4. Step 4: Simplify right side
   144,259.95x = 17,456,868,633.23
5. Step 5: Solve for x
   x = 17,456,868,633.23/144,259.95
6. Step 6: Final answer
   x = 121,009.81