Finding the Fourth Proportional to 65,389.70, 90,214.56 and 42,741.77

Step by Step Solution

1. Step 1: Write the proportion equation
   65,389.70 : 90,214.56 = 42,741.77 : x
2. Step 2: Convert to fraction form
   65,389.70/90,214.56 = 42,741.77/x
3. Step 3: Cross multiply
   65,389.70x = 90,214.56 × 42,741.77
4. Step 4: Simplify right side
   65,389.70x = 3,855,929,523.10
5. Step 5: Solve for x
   x = 3,855,929,523.10/65,389.70
6. Step 6: Final answer
   x = 58,968.45