Finding the Fourth Proportional to 90,215.06, 135,233.34 and 42,746.76

Step by Step Solution

1. Step 1: Write the proportion equation
   90,215.06 : 135,233.34 = 42,746.76 : x
2. Step 2: Convert to fraction form
   90,215.06/135,233.34 = 42,746.76/x
3. Step 3: Cross multiply
   90,215.06x = 135,233.34 × 42,746.76
4. Step 4: Simplify right side
   90,215.06x = 5,780,787,128.98
5. Step 5: Solve for x
   x = 5,780,787,128.98/90,215.06
6. Step 6: Final answer
   x = 64,077.85