Finding the Fourth Proportional to 42,045.42, 58,026.78 and 31,416.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,045.42 : 58,026.78 = 31,416.60 : x
2. Step 2: Convert to fraction form
   42,045.42/58,026.78 = 31,416.60/x
3. Step 3: Cross multiply
   42,045.42x = 58,026.78 × 31,416.60
4. Step 4: Simplify right side
   42,045.42x = 1,823,004,136.55
5. Step 5: Solve for x
   x = 1,823,004,136.55/42,045.42
6. Step 6: Final answer
   x = 43,357.97