Finding the Fourth Proportional to 108,676.34, 149,985.64 and 72,375.78

Step by Step Solution

1. Step 1: Write the proportion equation
   108,676.34 : 149,985.64 = 72,375.78 : x
2. Step 2: Convert to fraction form
   108,676.34/149,985.64 = 72,375.78/x
3. Step 3: Cross multiply
   108,676.34x = 149,985.64 × 72,375.78
4. Step 4: Simplify right side
   108,676.34x = 10,855,327,683.80
5. Step 5: Solve for x
   x = 10,855,327,683.80/108,676.34
6. Step 6: Final answer
   x = 99,886.76