Finding the Fourth Proportional to 65,138.17, 89,819.29 and 42,435.06

Step by Step Solution

1. Step 1: Write the proportion equation
   65,138.17 : 89,819.29 = 42,435.06 : x
2. Step 2: Convert to fraction form
   65,138.17/89,819.29 = 42,435.06/x
3. Step 3: Cross multiply
   65,138.17x = 89,819.29 × 42,435.06
4. Step 4: Simplify right side
   65,138.17x = 3,811,486,848.03
5. Step 5: Solve for x
   x = 3,811,486,848.03/65,138.17
6. Step 6: Final answer
   x = 58,513.88