Finding the Fourth Proportional to 113,599.45, 170,290.50 and 42,502.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,599.45 : 170,290.50 = 42,502.78 : x
2. Step 2: Convert to fraction form
   113,599.45/170,290.50 = 42,502.78/x
3. Step 3: Cross multiply
   113,599.45x = 170,290.50 × 42,502.78
4. Step 4: Simplify right side
   113,599.45x = 7,237,819,657.59
5. Step 5: Solve for x
   x = 7,237,819,657.59/113,599.45
6. Step 6: Final answer
   x = 63,713.51