Finding the Fourth Proportional to 11,858.58, 17,787.69 and 3,538.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,858.58 : 17,787.69 = 3,538.62 : x
2. Step 2: Convert to fraction form
   11,858.58/17,787.69 = 3,538.62/x
3. Step 3: Cross multiply
   11,858.58x = 17,787.69 × 3,538.62
4. Step 4: Simplify right side
   11,858.58x = 62,943,875.59
5. Step 5: Solve for x
   x = 62,943,875.59/11,858.58
6. Step 6: Final answer
   x = 5,307.88