Finding the Fourth Proportional to 108,673.06, 149,913.22 and 72,436.90

Step by Step Solution

1. Step 1: Write the proportion equation
   108,673.06 : 149,913.22 = 72,436.90 : x
2. Step 2: Convert to fraction form
   108,673.06/149,913.22 = 72,436.90/x
3. Step 3: Cross multiply
   108,673.06x = 149,913.22 × 72,436.90
4. Step 4: Simplify right side
   108,673.06x = 10,859,248,925.82
5. Step 5: Solve for x
   x = 10,859,248,925.82/108,673.06
6. Step 6: Final answer
   x = 99,925.86