Finding the Fourth Proportional to 78,145.58, 107,840.70 and 42,336.48

Step by Step Solution

1. Step 1: Write the proportion equation
   78,145.58 : 107,840.70 = 42,336.48 : x
2. Step 2: Convert to fraction form
   78,145.58/107,840.70 = 42,336.48/x
3. Step 3: Cross multiply
   78,145.58x = 107,840.70 × 42,336.48
4. Step 4: Simplify right side
   78,145.58x = 4,565,595,638.74
5. Step 5: Solve for x
   x = 4,565,595,638.74/78,145.58
6. Step 6: Final answer
   x = 58,424.23