Finding the Fourth Proportional to 78,145.53, 107,840.40 and 42,336.24

Step by Step Solution

1. Step 1: Write the proportion equation
   78,145.53 : 107,840.40 = 42,336.24 : x
2. Step 2: Convert to fraction form
   78,145.53/107,840.40 = 42,336.24/x
3. Step 3: Cross multiply
   78,145.53x = 107,840.40 × 42,336.24
4. Step 4: Simplify right side
   78,145.53x = 4,565,557,056.10
5. Step 5: Solve for x
   x = 4,565,557,056.10/78,145.53
6. Step 6: Final answer
   x = 58,423.78