Finding the Fourth Proportional to 56,505, 77,979.33 and 31,354.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,505 : 77,979.33 = 31,354.50 : x
2. Step 2: Convert to fraction form
   56,505/77,979.33 = 31,354.50/x
3. Step 3: Cross multiply
   56,505x = 77,979.33 × 31,354.50
4. Step 4: Simplify right side
   56,505x = 2,445,002,902.49
5. Step 5: Solve for x
   x = 2,445,002,902.49/56,505
6. Step 6: Final answer
   x = 43,270.56