Finding the Fourth Proportional to 113,388.67, 170,069.78 and 42,313.76

Step by Step Solution

1. Step 1: Write the proportion equation
   113,388.67 : 170,069.78 = 42,313.76 : x
2. Step 2: Convert to fraction form
   113,388.67/170,069.78 = 42,313.76/x
3. Step 3: Cross multiply
   113,388.67x = 170,069.78 × 42,313.76
4. Step 4: Simplify right side
   113,388.67x = 7,196,291,109.61
5. Step 5: Solve for x
   x = 7,196,291,109.61/113,388.67
6. Step 6: Final answer
   x = 63,465.70