Finding the Fourth Proportional to 128,499.82, 192,748.58 and 100,443.46

Step by Step Solution

1. Step 1: Write the proportion equation
   128,499.82 : 192,748.58 = 100,443.46 : x
2. Step 2: Convert to fraction form
   128,499.82/192,748.58 = 100,443.46/x
3. Step 3: Cross multiply
   128,499.82x = 192,748.58 × 100,443.46
4. Step 4: Simplify right side
   128,499.82x = 19,360,334,285.29
5. Step 5: Solve for x
   x = 19,360,334,285.29/128,499.82
6. Step 6: Final answer
   x = 150,664.29