Finding the Fourth Proportional to 90,105.56, 134,823.54 and 56,669.48

Step by Step Solution

1. Step 1: Write the proportion equation
   90,105.56 : 134,823.54 = 56,669.48 : x
2. Step 2: Convert to fraction form
   90,105.56/134,823.54 = 56,669.48/x
3. Step 3: Cross multiply
   90,105.56x = 134,823.54 × 56,669.48
4. Step 4: Simplify right side
   90,105.56x = 7,640,379,903.56
5. Step 5: Solve for x
   x = 7,640,379,903.56/90,105.56
6. Step 6: Final answer
   x = 84,793.66