Finding the Fourth Proportional to 31,057.41, 42,887.67 and 19,730.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,057.41 : 42,887.67 = 19,730.55 : x
2. Step 2: Convert to fraction form
   31,057.41/42,887.67 = 19,730.55/x
3. Step 3: Cross multiply
   31,057.41x = 42,887.67 × 19,730.55
4. Step 4: Simplify right side
   31,057.41x = 846,197,317.32
5. Step 5: Solve for x
   x = 846,197,317.32/31,057.41
6. Step 6: Final answer
   x = 27,246.23