Finding the Fourth Proportional to 72,531.62, 108,796.88 and 51,096.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,531.62 : 108,796.88 = 51,096.09 : x
2. Step 2: Convert to fraction form
   72,531.62/108,796.88 = 51,096.09/x
3. Step 3: Cross multiply
   72,531.62x = 108,796.88 × 51,096.09
4. Step 4: Simplify right side
   72,531.62x = 5,559,095,172.20
5. Step 5: Solve for x
   x = 5,559,095,172.20/72,531.62
6. Step 6: Final answer
   x = 76,643.75