Finding the Fourth Proportional to 112,271.83, 154,671.94 and 78,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,271.83 : 154,671.94 = 78,218.72 : x
2. Step 2: Convert to fraction form
   112,271.83/154,671.94 = 78,218.72/x
3. Step 3: Cross multiply
   112,271.83x = 154,671.94 × 78,218.72
4. Step 4: Simplify right side
   112,271.83x = 12,098,241,166.72
5. Step 5: Solve for x
   x = 12,098,241,166.72/112,271.83
6. Step 6: Final answer
   x = 107,758.48