Finding the Fourth Proportional to 89,690.91, 134,470.49 and 42,976.59

Step by Step Solution

1. Step 1: Write the proportion equation
   89,690.91 : 134,470.49 = 42,976.59 : x
2. Step 2: Convert to fraction form
   89,690.91/134,470.49 = 42,976.59/x
3. Step 3: Cross multiply
   89,690.91x = 134,470.49 × 42,976.59
4. Step 4: Simplify right side
   89,690.91x = 5,779,082,900.95
5. Step 5: Solve for x
   x = 5,779,082,900.95/89,690.91
6. Step 6: Final answer
   x = 64,433.32