Finding the Fourth Proportional to 65,087.34, 89,791.56 and 42,421.08

Step by Step Solution

1. Step 1: Write the proportion equation
   65,087.34 : 89,791.56 = 42,421.08 : x
2. Step 2: Convert to fraction form
   65,087.34/89,791.56 = 42,421.08/x
3. Step 3: Cross multiply
   65,087.34x = 89,791.56 × 42,421.08
4. Step 4: Simplify right side
   65,087.34x = 3,809,054,950.08
5. Step 5: Solve for x
   x = 3,809,054,950.08/65,087.34
6. Step 6: Final answer
   x = 58,522.21