Finding the Fourth Proportional to 113,800.95, 170,719.89 and 42,729.18

Step by Step Solution

1. Step 1: Write the proportion equation
   113,800.95 : 170,719.89 = 42,729.18 : x
2. Step 2: Convert to fraction form
   113,800.95/170,719.89 = 42,729.18/x
3. Step 3: Cross multiply
   113,800.95x = 170,719.89 × 42,729.18
4. Step 4: Simplify right side
   113,800.95x = 7,294,720,909.39
5. Step 5: Solve for x
   x = 7,294,720,909.39/113,800.95
6. Step 6: Final answer
   x = 64,100.70