Finding the Fourth Proportional to 78,374.92, 108,157 and 42,564.64

Step by Step Solution

1. Step 1: Write the proportion equation
   78,374.92 : 108,157 = 42,564.64 : x
2. Step 2: Convert to fraction form
   78,374.92/108,157 = 42,564.64/x
3. Step 3: Cross multiply
   78,374.92x = 108,157 × 42,564.64
4. Step 4: Simplify right side
   78,374.92x = 4,603,663,768.48
5. Step 5: Solve for x
   x = 4,603,663,768.48/78,374.92
6. Step 6: Final answer
   x = 58,738.99