Finding the Fourth Proportional to 56,555.19, 78,046.16 and 31,404.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,555.19 : 78,046.16 = 31,404.69 : x
2. Step 2: Convert to fraction form
   56,555.19/78,046.16 = 31,404.69/x
3. Step 3: Cross multiply
   56,555.19x = 78,046.16 × 31,404.69
4. Step 4: Simplify right side
   56,555.19x = 2,451,015,460.49
5. Step 5: Solve for x
   x = 2,451,015,460.49/56,555.19
6. Step 6: Final answer
   x = 43,338.47