Finding the Fourth Proportional to 90,102.42, 134,978.67 and 43,388.10

Step by Step Solution

1. Step 1: Write the proportion equation
   90,102.42 : 134,978.67 = 43,388.10 : x
2. Step 2: Convert to fraction form
   90,102.42/134,978.67 = 43,388.10/x
3. Step 3: Cross multiply
   90,102.42x = 134,978.67 × 43,388.10
4. Step 4: Simplify right side
   90,102.42x = 5,856,468,031.83
5. Step 5: Solve for x
   x = 5,856,468,031.83/90,102.42
6. Step 6: Final answer
   x = 64,997.90