Finding the Fourth Proportional to 37,123.95, 51,230.43 and 20,991

Step by Step Solution

1. Step 1: Write the proportion equation
   37,123.95 : 51,230.43 = 20,991 : x
2. Step 2: Convert to fraction form
   37,123.95/51,230.43 = 20,991/x
3. Step 3: Cross multiply
   37,123.95x = 51,230.43 × 20,991
4. Step 4: Simplify right side
   37,123.95x = 1,075,377,956.13
5. Step 5: Solve for x
   x = 1,075,377,956.13/37,123.95
6. Step 6: Final answer
   x = 28,967.23