Finding the Fourth Proportional to 112,468.32, 155,144.88 and 72,137.22

Step by Step Solution

1. Step 1: Write the proportion equation
   112,468.32 : 155,144.88 = 72,137.22 : x
2. Step 2: Convert to fraction form
   112,468.32/155,144.88 = 72,137.22/x
3. Step 3: Cross multiply
   112,468.32x = 155,144.88 × 72,137.22
4. Step 4: Simplify right side
   112,468.32x = 11,191,720,340.43
5. Step 5: Solve for x
   x = 11,191,720,340.43/112,468.32
6. Step 6: Final answer
   x = 99,509.98