Finding the Fourth Proportional to 56,819.02, 78,410.79 and 31,326.40

Step by Step Solution

1. Step 1: Write the proportion equation
   56,819.02 : 78,410.79 = 31,326.40 : x
2. Step 2: Convert to fraction form
   56,819.02/78,410.79 = 31,326.40/x
3. Step 3: Cross multiply
   56,819.02x = 78,410.79 × 31,326.40
4. Step 4: Simplify right side
   56,819.02x = 2,456,327,771.86
5. Step 5: Solve for x
   x = 2,456,327,771.86/56,819.02
6. Step 6: Final answer
   x = 43,230.73