Finding the Fourth Proportional to 112,418.19, 155,096.71 and 72,154.10

Step by Step Solution

1. Step 1: Write the proportion equation
   112,418.19 : 155,096.71 = 72,154.10 : x
2. Step 2: Convert to fraction form
   112,418.19/155,096.71 = 72,154.10/x
3. Step 3: Cross multiply
   112,418.19x = 155,096.71 × 72,154.10
4. Step 4: Simplify right side
   112,418.19x = 11,190,863,730.37
5. Step 5: Solve for x
   x = 11,190,863,730.37/112,418.19
6. Step 6: Final answer
   x = 99,546.73