Finding the Fourth Proportional to 115,978.83, 173,672.87 and 76,416.03

Step by Step Solution

1. Step 1: Write the proportion equation
   115,978.83 : 173,672.87 = 76,416.03 : x
2. Step 2: Convert to fraction form
   115,978.83/173,672.87 = 76,416.03/x
3. Step 3: Cross multiply
   115,978.83x = 173,672.87 × 76,416.03
4. Step 4: Simplify right side
   115,978.83x = 13,271,390,862.03
5. Step 5: Solve for x
   x = 13,271,390,862.03/115,978.83
6. Step 6: Final answer
   x = 114,429.43