Finding the Fourth Proportional to 58,428.78, 87,654.06 and 18,975.30

Step by Step Solution

1. Step 1: Write the proportion equation
   58,428.78 : 87,654.06 = 18,975.30 : x
2. Step 2: Convert to fraction form
   58,428.78/87,654.06 = 18,975.30/x
3. Step 3: Cross multiply
   58,428.78x = 87,654.06 × 18,975.30
4. Step 4: Simplify right side
   58,428.78x = 1,663,262,084.72
5. Step 5: Solve for x
   x = 1,663,262,084.72/58,428.78
6. Step 6: Final answer
   x = 28,466.49