Finding the Fourth Proportional to 31,008.10, 42,776.14 and 18,423.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,008.10 : 42,776.14 = 18,423.94 : x
2. Step 2: Convert to fraction form
   31,008.10/42,776.14 = 18,423.94/x
3. Step 3: Cross multiply
   31,008.10x = 42,776.14 × 18,423.94
4. Step 4: Simplify right side
   31,008.10x = 788,105,036.79
5. Step 5: Solve for x
   x = 788,105,036.79/31,008.10
6. Step 6: Final answer
   x = 25,416.10