Finding the Fourth Proportional to 78,735.20, 108,654.64 and 42,925.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,735.20 : 108,654.64 = 42,925.28 : x
2. Step 2: Convert to fraction form
   78,735.20/108,654.64 = 42,925.28/x
3. Step 3: Cross multiply
   78,735.20x = 108,654.64 × 42,925.28
4. Step 4: Simplify right side
   78,735.20x = 4,664,030,845.30
5. Step 5: Solve for x
   x = 4,664,030,845.30/78,735.20
6. Step 6: Final answer
   x = 59,236.92