Finding the Fourth Proportional to 90,688.42, 135,421.52 and 74,081.26

Step by Step Solution

1. Step 1: Write the proportion equation
   90,688.42 : 135,421.52 = 74,081.26 : x
2. Step 2: Convert to fraction form
   90,688.42/135,421.52 = 74,081.26/x
3. Step 3: Cross multiply
   90,688.42x = 135,421.52 × 74,081.26
4. Step 4: Simplify right side
   90,688.42x = 10,032,196,832.72
5. Step 5: Solve for x
   x = 10,032,196,832.72/90,688.42
6. Step 6: Final answer
   x = 110,622.69