Finding the Fourth Proportional to 113,861.48, 170,810.58 and 42,789.65

Step by Step Solution

1. Step 1: Write the proportion equation
   113,861.48 : 170,810.58 = 42,789.65 : x
2. Step 2: Convert to fraction form
   113,861.48/170,810.58 = 42,789.65/x
3. Step 3: Cross multiply
   113,861.48x = 170,810.58 × 42,789.65
4. Step 4: Simplify right side
   113,861.48x = 7,308,924,934.50
5. Step 5: Solve for x
   x = 7,308,924,934.50/113,861.48
6. Step 6: Final answer
   x = 64,191.37