Finding the Fourth Proportional to 111,316.48, 152,701.84 and 105,290.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111,316.48 : 152,701.84 = 105,290.56 : x
2. Step 2: Convert to fraction form
   111,316.48/152,701.84 = 105,290.56/x
3. Step 3: Cross multiply
   111,316.48x = 152,701.84 × 105,290.56
4. Step 4: Simplify right side
   111,316.48x = 16,078,062,246.63
5. Step 5: Solve for x
   x = 16,078,062,246.63/111,316.48
6. Step 6: Final answer
   x = 144,435.60