Finding the Fourth Proportional to 100,987.58, 139,361.18 and 55,047.83

Step by Step Solution

1. Step 1: Write the proportion equation
   100,987.58 : 139,361.18 = 55,047.83 : x
2. Step 2: Convert to fraction form
   100,987.58/139,361.18 = 55,047.83/x
3. Step 3: Cross multiply
   100,987.58x = 139,361.18 × 55,047.83
4. Step 4: Simplify right side
   100,987.58x = 7,671,529,573.19
5. Step 5: Solve for x
   x = 7,671,529,573.19/100,987.58
6. Step 6: Final answer
   x = 75,965.08