Finding the Fourth Proportional to 139,855.32, 209,633.58 and 55,498.68

Step by Step Solution

1. Step 1: Write the proportion equation
   139,855.32 : 209,633.58 = 55,498.68 : x
2. Step 2: Convert to fraction form
   139,855.32/209,633.58 = 55,498.68/x
3. Step 3: Cross multiply
   139,855.32x = 209,633.58 × 55,498.68
4. Step 4: Simplify right side
   139,855.32x = 11,634,386,973.67
5. Step 5: Solve for x
   x = 11,634,386,973.67/139,855.32
6. Step 6: Final answer
   x = 83,188.73