Finding the Fourth Proportional to 73,977.72, 102,089.34 and 40,443.72

Step by Step Solution

1. Step 1: Write the proportion equation
   73,977.72 : 102,089.34 = 40,443.72 : x
2. Step 2: Convert to fraction form
   73,977.72/102,089.34 = 40,443.72/x
3. Step 3: Cross multiply
   73,977.72x = 102,089.34 × 40,443.72
4. Step 4: Simplify right side
   73,977.72x = 4,128,872,681.94
5. Step 5: Solve for x
   x = 4,128,872,681.94/73,977.72
6. Step 6: Final answer
   x = 55,812.38