Finding the Fourth Proportional to 78,788.30, 108,724.28 and 42,977.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,788.30 : 108,724.28 = 42,977.08 : x
2. Step 2: Convert to fraction form
   78,788.30/108,724.28 = 42,977.08/x
3. Step 3: Cross multiply
   78,788.30x = 108,724.28 × 42,977.08
4. Step 4: Simplify right side
   78,788.30x = 4,672,652,000.52
5. Step 5: Solve for x
   x = 4,672,652,000.52/78,788.30
6. Step 6: Final answer
   x = 59,306.42