Finding the Fourth Proportional to 78,428.54, 108,232.04 and 42,618.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,428.54 : 108,232.04 = 42,618.55 : x
2. Step 2: Convert to fraction form
   78,428.54/108,232.04 = 42,618.55/x
3. Step 3: Cross multiply
   78,428.54x = 108,232.04 × 42,618.55
4. Step 4: Simplify right side
   78,428.54x = 4,612,692,608.34
5. Step 5: Solve for x
   x = 4,612,692,608.34/78,428.54
6. Step 6: Final answer
   x = 58,813.95