Finding the Fourth Proportional to 90,288.16, 135,443.76 and 34,162.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90,288.16 : 135,443.76 = 34,162.72 : x
2. Step 2: Convert to fraction form
   90,288.16/135,443.76 = 34,162.72/x
3. Step 3: Cross multiply
   90,288.16x = 135,443.76 × 34,162.72
4. Step 4: Simplify right side
   90,288.16x = 4,627,127,248.63
5. Step 5: Solve for x
   x = 4,627,127,248.63/90,288.16
6. Step 6: Final answer
   x = 51,248.44