Finding the Fourth Proportional to 131,819, 181,910.86 and 72,203

Step by Step Solution

1. Step 1: Write the proportion equation
   131,819 : 181,910.86 = 72,203 : x
2. Step 2: Convert to fraction form
   131,819/181,910.86 = 72,203/x
3. Step 3: Cross multiply
   131,819x = 181,910.86 × 72,203
4. Step 4: Simplify right side
   131,819x = 13,134,509,824.58
5. Step 5: Solve for x
   x = 13,134,509,824.58/131,819
6. Step 6: Final answer
   x = 99,640.49