Finding the Fourth Proportional to 112,389.48, 168,590.72 and 42,269.40

Step by Step Solution

1. Step 1: Write the proportion equation
   112,389.48 : 168,590.72 = 42,269.40 : x
2. Step 2: Convert to fraction form
   112,389.48/168,590.72 = 42,269.40/x
3. Step 3: Cross multiply
   112,389.48x = 168,590.72 × 42,269.40
4. Step 4: Simplify right side
   112,389.48x = 7,126,228,579.97
5. Step 5: Solve for x
   x = 7,126,228,579.97/112,389.48
6. Step 6: Final answer
   x = 63,406.54