Finding the Fourth Proportional to 88,196.42, 121,664.40 and 55,874.02

Step by Step Solution

1. Step 1: Write the proportion equation
   88,196.42 : 121,664.40 = 55,874.02 : x
2. Step 2: Convert to fraction form
   88,196.42/121,664.40 = 55,874.02/x
3. Step 3: Cross multiply
   88,196.42x = 121,664.40 × 55,874.02
4. Step 4: Simplify right side
   88,196.42x = 6,797,879,118.89
5. Step 5: Solve for x
   x = 6,797,879,118.89/88,196.42
6. Step 6: Final answer
   x = 77,076.59