Finding the Fourth Proportional to 56,498.21, 77,967.31 and 31,005

Step by Step Solution

1. Step 1: Write the proportion equation
   56,498.21 : 77,967.31 = 31,005 : x
2. Step 2: Convert to fraction form
   56,498.21/77,967.31 = 31,005/x
3. Step 3: Cross multiply
   56,498.21x = 77,967.31 × 31,005
4. Step 4: Simplify right side
   56,498.21x = 2,417,376,446.55
5. Step 5: Solve for x
   x = 2,417,376,446.55/56,498.21
6. Step 6: Final answer
   x = 42,786.78