Finding the Fourth Proportional to 28,513.49, 42,766.58 and 11,870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,513.49 : 42,766.58 = 11,870.42 : x
2. Step 2: Convert to fraction form
   28,513.49/42,766.58 = 11,870.42/x
3. Step 3: Cross multiply
   28,513.49x = 42,766.58 × 11,870.42
4. Step 4: Simplify right side
   28,513.49x = 507,657,082.41
5. Step 5: Solve for x
   x = 507,657,082.41/28,513.49
6. Step 6: Final answer
   x = 17,804.11