Finding the Fourth Proportional to 90,207.16, 135,307.94 and 42,856.34

Step by Step Solution

1. Step 1: Write the proportion equation
   90,207.16 : 135,307.94 = 42,856.34 : x
2. Step 2: Convert to fraction form
   90,207.16/135,307.94 = 42,856.34/x
3. Step 3: Cross multiply
   90,207.16x = 135,307.94 × 42,856.34
4. Step 4: Simplify right side
   90,207.16x = 5,798,803,081.34
5. Step 5: Solve for x
   x = 5,798,803,081.34/90,207.16
6. Step 6: Final answer
   x = 64,283.18