Finding the Fourth Proportional to 101,099.82, 139,582.62 and 90,471

Step by Step Solution

1. Step 1: Write the proportion equation
   101,099.82 : 139,582.62 = 90,471 : x
2. Step 2: Convert to fraction form
   101,099.82/139,582.62 = 90,471/x
3. Step 3: Cross multiply
   101,099.82x = 139,582.62 × 90,471
4. Step 4: Simplify right side
   101,099.82x = 12,628,179,214.02
5. Step 5: Solve for x
   x = 12,628,179,214.02/101,099.82
6. Step 6: Final answer
   x = 124,908.03