Finding the Fourth Proportional to 37,087.88, 51,131.70 and 30,690.90

Step by Step Solution

1. Step 1: Write the proportion equation
   37,087.88 : 51,131.70 = 30,690.90 : x
2. Step 2: Convert to fraction form
   37,087.88/51,131.70 = 30,690.90/x
3. Step 3: Cross multiply
   37,087.88x = 51,131.70 × 30,690.90
4. Step 4: Simplify right side
   37,087.88x = 1,569,277,891.53
5. Step 5: Solve for x
   x = 1,569,277,891.53/37,087.88
6. Step 6: Final answer
   x = 42,312.42