Finding the Fourth Proportional to 296,779.59, 445,165.43 and 72,139.41

Step by Step Solution

1. Step 1: Write the proportion equation
   296,779.59 : 445,165.43 = 72,139.41 : x
2. Step 2: Convert to fraction form
   296,779.59/445,165.43 = 72,139.41/x
3. Step 3: Cross multiply
   296,779.59x = 445,165.43 × 72,139.41
4. Step 4: Simplify right side
   296,779.59x = 32,113,971,111.90
5. Step 5: Solve for x
   x = 32,113,971,111.90/296,779.59
6. Step 6: Final answer
   x = 108,208.15