Finding the Fourth Proportional to 90,518.55, 135,781.47 and 43,109.25

Step by Step Solution

1. Step 1: Write the proportion equation
   90,518.55 : 135,781.47 = 43,109.25 : x
2. Step 2: Convert to fraction form
   90,518.55/135,781.47 = 43,109.25/x
3. Step 3: Cross multiply
   90,518.55x = 135,781.47 × 43,109.25
4. Step 4: Simplify right side
   90,518.55x = 5,853,437,335.60
5. Step 5: Solve for x
   x = 5,853,437,335.60/90,518.55
6. Step 6: Final answer
   x = 64,665.61