Finding the Fourth Proportional to 112,458.84, 155,131.77 and 72,127.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,458.84 : 155,131.77 = 72,127.72 : x
2. Step 2: Convert to fraction form
   112,458.84/155,131.77 = 72,127.72/x
3. Step 3: Cross multiply
   112,458.84x = 155,131.77 × 72,127.72
4. Step 4: Simplify right side
   112,458.84x = 11,189,300,869.66
5. Step 5: Solve for x
   x = 11,189,300,869.66/112,458.84
6. Step 6: Final answer
   x = 99,496.85