Finding the Fourth Proportional to 109,401.80, 164,037.90 and 56,913.80

Step by Step Solution

1. Step 1: Write the proportion equation
   109,401.80 : 164,037.90 = 56,913.80 : x
2. Step 2: Convert to fraction form
   109,401.80/164,037.90 = 56,913.80/x
3. Step 3: Cross multiply
   109,401.80x = 164,037.90 × 56,913.80
4. Step 4: Simplify right side
   109,401.80x = 9,336,020,233.02
5. Step 5: Solve for x
   x = 9,336,020,233.02/109,401.80
6. Step 6: Final answer
   x = 85,336.99