Finding the Fourth Proportional to 78,136.38, 107,828.24 and 42,326.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,136.38 : 107,828.24 = 42,326.28 : x
2. Step 2: Convert to fraction form
   78,136.38/107,828.24 = 42,326.28/x
3. Step 3: Cross multiply
   78,136.38x = 107,828.24 × 42,326.28
4. Step 4: Simplify right side
   78,136.38x = 4,563,968,066.52
5. Step 5: Solve for x
   x = 4,563,968,066.52/78,136.38
6. Step 6: Final answer
   x = 58,410.28