Finding the Fourth Proportional to 138,922.56, 208,422.72 and 55,874.88

Step by Step Solution

1. Step 1: Write the proportion equation
   138,922.56 : 208,422.72 = 55,874.88 : x
2. Step 2: Convert to fraction form
   138,922.56/208,422.72 = 55,874.88/x
3. Step 3: Cross multiply
   138,922.56x = 208,422.72 × 55,874.88
4. Step 4: Simplify right side
   138,922.56x = 11,645,594,469.27
5. Step 5: Solve for x
   x = 11,645,594,469.27/138,922.56
6. Step 6: Final answer
   x = 83,827.96