Finding the Fourth Proportional to 108,587.91, 149,800.55 and 72,307.61

Step by Step Solution

1. Step 1: Write the proportion equation
   108,587.91 : 149,800.55 = 72,307.61 : x
2. Step 2: Convert to fraction form
   108,587.91/149,800.55 = 72,307.61/x
3. Step 3: Cross multiply
   108,587.91x = 149,800.55 × 72,307.61
4. Step 4: Simplify right side
   108,587.91x = 10,831,718,636.64
5. Step 5: Solve for x
   x = 10,831,718,636.64/108,587.91
6. Step 6: Final answer
   x = 99,750.69