Finding the Fourth Proportional to 78,659.10, 108,549.42 and 42,849

Step by Step Solution

1. Step 1: Write the proportion equation
   78,659.10 : 108,549.42 = 42,849 : x
2. Step 2: Convert to fraction form
   78,659.10/108,549.42 = 42,849/x
3. Step 3: Cross multiply
   78,659.10x = 108,549.42 × 42,849
4. Step 4: Simplify right side
   78,659.10x = 4,651,234,097.58
5. Step 5: Solve for x
   x = 4,651,234,097.58/78,659.10
6. Step 6: Final answer
   x = 59,131.54