Finding the Fourth Proportional to 56,361.39, 77,778.72 and 31,210.89

Step by Step Solution

1. Step 1: Write the proportion equation
   56,361.39 : 77,778.72 = 31,210.89 : x
2. Step 2: Convert to fraction form
   56,361.39/77,778.72 = 31,210.89/x
3. Step 3: Cross multiply
   56,361.39x = 77,778.72 × 31,210.89
4. Step 4: Simplify right side
   56,361.39x = 2,427,543,074.26
5. Step 5: Solve for x
   x = 2,427,543,074.26/56,361.39
6. Step 6: Final answer
   x = 43,071.03