Finding the Fourth Proportional to 78,589.63, 108,454.10 and 42,779.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,589.63 : 108,454.10 = 42,779.94 : x
2. Step 2: Convert to fraction form
   78,589.63/108,454.10 = 42,779.94/x
3. Step 3: Cross multiply
   78,589.63x = 108,454.10 × 42,779.94
4. Step 4: Simplify right side
   78,589.63x = 4,639,659,890.75
5. Step 5: Solve for x
   x = 4,639,659,890.75/78,589.63
6. Step 6: Final answer
   x = 59,036.54