Finding the Fourth Proportional to 131,699, 181,745.90 and 72,084.28

Step by Step Solution

1. Step 1: Write the proportion equation
   131,699 : 181,745.90 = 72,084.28 : x
2. Step 2: Convert to fraction form
   131,699/181,745.90 = 72,084.28/x
3. Step 3: Cross multiply
   131,699x = 181,745.90 × 72,084.28
4. Step 4: Simplify right side
   131,699x = 13,101,022,344.45
5. Step 5: Solve for x
   x = 13,101,022,344.45/131,699
6. Step 6: Final answer
   x = 99,477.01