Finding the Fourth Proportional to 56,819.12, 78,552.10 and 42,647.36

Step by Step Solution

1. Step 1: Write the proportion equation
   56,819.12 : 78,552.10 = 42,647.36 : x
2. Step 2: Convert to fraction form
   56,819.12/78,552.10 = 42,647.36/x
3. Step 3: Cross multiply
   56,819.12x = 78,552.10 × 42,647.36
4. Step 4: Simplify right side
   56,819.12x = 3,350,039,687.46
5. Step 5: Solve for x
   x = 3,350,039,687.46/56,819.12
6. Step 6: Final answer
   x = 58,959.72