Finding the Fourth Proportional to 88,591.22, 122,156.56 and 72,408.30

Step by Step Solution

1. Step 1: Write the proportion equation
   88,591.22 : 122,156.56 = 72,408.30 : x
2. Step 2: Convert to fraction form
   88,591.22/122,156.56 = 72,408.30/x
3. Step 3: Cross multiply
   88,591.22x = 122,156.56 × 72,408.30
4. Step 4: Simplify right side
   88,591.22x = 8,845,148,843.45
5. Step 5: Solve for x
   x = 8,845,148,843.45/88,591.22
6. Step 6: Final answer
   x = 99,842.27