Finding the Fourth Proportional to 71,433.72, 107,128.71 and 49,388.76

Step by Step Solution

1. Step 1: Write the proportion equation
   71,433.72 : 107,128.71 = 49,388.76 : x
2. Step 2: Convert to fraction form
   71,433.72/107,128.71 = 49,388.76/x
3. Step 3: Cross multiply
   71,433.72x = 107,128.71 × 49,388.76
4. Step 4: Simplify right side
   71,433.72x = 5,290,953,962.09
5. Step 5: Solve for x
   x = 5,290,953,962.09/71,433.72
6. Step 6: Final answer
   x = 74,068.02