Finding the Fourth Proportional to 101,507.38, 139,987.10 and 87,162.33

Step by Step Solution

1. Step 1: Write the proportion equation
   101,507.38 : 139,987.10 = 87,162.33 : x
2. Step 2: Convert to fraction form
   101,507.38/139,987.10 = 87,162.33/x
3. Step 3: Cross multiply
   101,507.38x = 139,987.10 × 87,162.33
4. Step 4: Simplify right side
   101,507.38x = 12,201,601,805.94
5. Step 5: Solve for x
   x = 12,201,601,805.94/101,507.38
6. Step 6: Final answer
   x = 120,204.09