Finding the Fourth Proportional to 131,618, 181,633.56 and 72,002

Step by Step Solution

1. Step 1: Write the proportion equation
   131,618 : 181,633.56 = 72,002 : x
2. Step 2: Convert to fraction form
   131,618/181,633.56 = 72,002/x
3. Step 3: Cross multiply
   131,618x = 181,633.56 × 72,002
4. Step 4: Simplify right side
   131,618x = 13,077,979,587.12
5. Step 5: Solve for x
   x = 13,077,979,587.12/131,618
6. Step 6: Final answer
   x = 99,363.15