Finding the Fourth Proportional to 31,017.34, 42,785.70 and 19,513.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,017.34 : 42,785.70 = 19,513.96 : x
2. Step 2: Convert to fraction form
   31,017.34/42,785.70 = 19,513.96/x
3. Step 3: Cross multiply
   31,017.34x = 42,785.70 × 19,513.96
4. Step 4: Simplify right side
   31,017.34x = 834,918,438.37
5. Step 5: Solve for x
   x = 834,918,438.37/31,017.34
6. Step 6: Final answer
   x = 26,917.80