Finding the Fourth Proportional to 90,378.56, 135,559.20 and 55,300.16

Step by Step Solution

1. Step 1: Write the proportion equation
   90,378.56 : 135,559.20 = 55,300.16 : x
2. Step 2: Convert to fraction form
   90,378.56/135,559.20 = 55,300.16/x
3. Step 3: Cross multiply
   90,378.56x = 135,559.20 × 55,300.16
4. Step 4: Simplify right side
   90,378.56x = 7,496,445,449.47
5. Step 5: Solve for x
   x = 7,496,445,449.47/90,378.56
6. Step 6: Final answer
   x = 82,944.95