Finding the Fourth Proportional to 31,114.60, 42,938.72 and 16,967.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,114.60 : 42,938.72 = 16,967.40 : x
2. Step 2: Convert to fraction form
   31,114.60/42,938.72 = 16,967.40/x
3. Step 3: Cross multiply
   31,114.60x = 42,938.72 × 16,967.40
4. Step 4: Simplify right side
   31,114.60x = 728,558,437.73
5. Step 5: Solve for x
   x = 728,558,437.73/31,114.60
6. Step 6: Final answer
   x = 23,415.32