Finding the Fourth Proportional to 31,109.85, 42,916.01 and 19,760.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,109.85 : 42,916.01 = 19,760.85 : x
2. Step 2: Convert to fraction form
   31,109.85/42,916.01 = 19,760.85/x
3. Step 3: Cross multiply
   31,109.85x = 42,916.01 × 19,760.85
4. Step 4: Simplify right side
   31,109.85x = 848,056,737.40
5. Step 5: Solve for x
   x = 848,056,737.40/31,109.85
6. Step 6: Final answer
   x = 27,260.07