Finding the Fourth Proportional to 72,178.56, 99,597.70 and 39,908.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,178.56 : 99,597.70 = 39,908.82 : x
2. Step 2: Convert to fraction form
   72,178.56/99,597.70 = 39,908.82/x
3. Step 3: Cross multiply
   72,178.56x = 99,597.70 × 39,908.82
4. Step 4: Simplify right side
   72,178.56x = 3,974,826,681.71
5. Step 5: Solve for x
   x = 3,974,826,681.71/72,178.56
6. Step 6: Final answer
   x = 55,069.35