Finding the Fourth Proportional to 89,916.08, 134,824.45 and 56,564.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,916.08 : 134,824.45 = 56,564.78 : x
2. Step 2: Convert to fraction form
   89,916.08/134,824.45 = 56,564.78/x
3. Step 3: Cross multiply
   89,916.08x = 134,824.45 × 56,564.78
4. Step 4: Simplify right side
   89,916.08x = 7,626,315,401.78
5. Step 5: Solve for x
   x = 7,626,315,401.78/89,916.08
6. Step 6: Final answer
   x = 84,815.93