Finding the Fourth Proportional to 324,978.53, 487,369.35 and 88,290.45

Step by Step Solution

1. Step 1: Write the proportion equation
   324,978.53 : 487,369.35 = 88,290.45 : x
2. Step 2: Convert to fraction form
   324,978.53/487,369.35 = 88,290.45/x
3. Step 3: Cross multiply
   324,978.53x = 487,369.35 × 88,290.45
4. Step 4: Simplify right side
   324,978.53x = 43,030,059,227.71
5. Step 5: Solve for x
   x = 43,030,059,227.71/324,978.53
6. Step 6: Final answer
   x = 132,408.93