Finding the Fourth Proportional to 72,384.16, 99,900.70 and 40,555.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72,384.16 : 99,900.70 = 40,555.22 : x
2. Step 2: Convert to fraction form
   72,384.16/99,900.70 = 40,555.22/x
3. Step 3: Cross multiply
   72,384.16x = 99,900.70 × 40,555.22
4. Step 4: Simplify right side
   72,384.16x = 4,051,494,866.65
5. Step 5: Solve for x
   x = 4,051,494,866.65/72,384.16
6. Step 6: Final answer
   x = 55,972.12