Finding the Fourth Proportional to 144,300.43, 216,498.63 and 90,930.74

Step by Step Solution

1. Step 1: Write the proportion equation
   144,300.43 : 216,498.63 = 90,930.74 : x
2. Step 2: Convert to fraction form
   144,300.43/216,498.63 = 90,930.74/x
3. Step 3: Cross multiply
   144,300.43x = 216,498.63 × 90,930.74
4. Step 4: Simplify right side
   144,300.43x = 19,686,380,634.89
5. Step 5: Solve for x
   x = 19,686,380,634.89/144,300.43
6. Step 6: Final answer
   x = 136,426.35