Finding the Fourth Proportional to 56,885.99, 78,499.82 and 31,730.63

Step by Step Solution

1. Step 1: Write the proportion equation
   56,885.99 : 78,499.82 = 31,730.63 : x
2. Step 2: Convert to fraction form
   56,885.99/78,499.82 = 31,730.63/x
3. Step 3: Cross multiply
   56,885.99x = 78,499.82 × 31,730.63
4. Step 4: Simplify right side
   56,885.99x = 2,490,848,584.83
5. Step 5: Solve for x
   x = 2,490,848,584.83/56,885.99
6. Step 6: Final answer
   x = 43,786.68