Finding the Fourth Proportional to 89,770.10, 134,493.15 and 42,919.70

Step by Step Solution

1. Step 1: Write the proportion equation
   89,770.10 : 134,493.15 = 42,919.70 : x
2. Step 2: Convert to fraction form
   89,770.10/134,493.15 = 42,919.70/x
3. Step 3: Cross multiply
   89,770.10x = 134,493.15 × 42,919.70
4. Step 4: Simplify right side
   89,770.10x = 5,772,405,650.06
5. Step 5: Solve for x
   x = 5,772,405,650.06/89,770.10
6. Step 6: Final answer
   x = 64,302.10