Finding the Fourth Proportional to 93,456.56, 139,519.10 and 90,175.88

Step by Step Solution

1. Step 1: Write the proportion equation
   93,456.56 : 139,519.10 = 90,175.88 : x
2. Step 2: Convert to fraction form
   93,456.56/139,519.10 = 90,175.88/x
3. Step 3: Cross multiply
   93,456.56x = 139,519.10 × 90,175.88
4. Step 4: Simplify right side
   93,456.56x = 12,581,257,619.31
5. Step 5: Solve for x
   x = 12,581,257,619.31/93,456.56
6. Step 6: Final answer
   x = 134,621.45