Finding the Fourth Proportional to 76,899.10, 115,307.52 and 39,443.86

Step by Step Solution

1. Step 1: Write the proportion equation
   76,899.10 : 115,307.52 = 39,443.86 : x
2. Step 2: Convert to fraction form
   76,899.10/115,307.52 = 39,443.86/x
3. Step 3: Cross multiply
   76,899.10x = 115,307.52 × 39,443.86
4. Step 4: Simplify right side
   76,899.10x = 4,548,173,675.83
5. Step 5: Solve for x
   x = 4,548,173,675.83/76,899.10
6. Step 6: Final answer
   x = 59,144.69