Finding the Fourth Proportional to 100,883.61, 139,213.83 and 55,553.03

Step by Step Solution

1. Step 1: Write the proportion equation
   100,883.61 : 139,213.83 = 55,553.03 : x
2. Step 2: Convert to fraction form
   100,883.61/139,213.83 = 55,553.03/x
3. Step 3: Cross multiply
   100,883.61x = 139,213.83 × 55,553.03
4. Step 4: Simplify right side
   100,883.61x = 7,733,749,100.57
5. Step 5: Solve for x
   x = 7,733,749,100.57/100,883.61
6. Step 6: Final answer
   x = 76,660.12