Finding the Fourth Proportional to 56,848.05, 78,449.22 and 31,356.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,848.05 : 78,449.22 = 31,356.78 : x
2. Step 2: Convert to fraction form
   56,848.05/78,449.22 = 31,356.78/x
3. Step 3: Cross multiply
   56,848.05x = 78,449.22 × 31,356.78
4. Step 4: Simplify right side
   56,848.05x = 2,459,914,932.71
5. Step 5: Solve for x
   x = 2,459,914,932.71/56,848.05
6. Step 6: Final answer
   x = 43,271.76