Finding the Fourth Proportional to 42,495.84, 58,613.76 and 31,168.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,495.84 : 58,613.76 = 31,168.80 : x
2. Step 2: Convert to fraction form
   42,495.84/58,613.76 = 31,168.80/x
3. Step 3: Cross multiply
   42,495.84x = 58,613.76 × 31,168.80
4. Step 4: Simplify right side
   42,495.84x = 1,826,920,562.69
5. Step 5: Solve for x
   x = 1,826,920,562.69/42,495.84
6. Step 6: Final answer
   x = 42,990.57