Finding the Fourth Proportional to 123,780.72, 185,649.13 and 56,296.95

Step by Step Solution

1. Step 1: Write the proportion equation
   123,780.72 : 185,649.13 = 56,296.95 : x
2. Step 2: Convert to fraction form
   123,780.72/185,649.13 = 56,296.95/x
3. Step 3: Cross multiply
   123,780.72x = 185,649.13 × 56,296.95
4. Step 4: Simplify right side
   123,780.72x = 10,451,479,789.15
5. Step 5: Solve for x
   x = 10,451,479,789.15/123,780.72
6. Step 6: Final answer
   x = 84,435.44