Finding the Fourth Proportional to 78,619.17, 108,491.22 and 42,809.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,619.17 : 108,491.22 = 42,809.10 : x
2. Step 2: Convert to fraction form
   78,619.17/108,491.22 = 42,809.10/x
3. Step 3: Cross multiply
   78,619.17x = 108,491.22 × 42,809.10
4. Step 4: Simplify right side
   78,619.17x = 4,644,411,486.10
5. Step 5: Solve for x
   x = 4,644,411,486.10/78,619.17
6. Step 6: Final answer
   x = 59,074.80