Finding the Fourth Proportional to 143,300.91, 197,546.85 and 100,146.45

Step by Step Solution

1. Step 1: Write the proportion equation
   143,300.91 : 197,546.85 = 100,146.45 : x
2. Step 2: Convert to fraction form
   143,300.91/197,546.85 = 100,146.45/x
3. Step 3: Cross multiply
   143,300.91x = 197,546.85 × 100,146.45
4. Step 4: Simplify right side
   143,300.91x = 19,783,615,736.18
5. Step 5: Solve for x
   x = 19,783,615,736.18/143,300.91
6. Step 6: Final answer
   x = 138,056.46