Finding the Fourth Proportional to 78,396.38, 108,185.18 and 42,585.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,396.38 : 108,185.18 = 42,585.60 : x
2. Step 2: Convert to fraction form
   78,396.38/108,185.18 = 42,585.60/x
3. Step 3: Cross multiply
   78,396.38x = 108,185.18 × 42,585.60
4. Step 4: Simplify right side
   78,396.38x = 4,607,130,801.41
5. Step 5: Solve for x
   x = 4,607,130,801.41/78,396.38
6. Step 6: Final answer
   x = 58,767.14