Finding the Fourth Proportional to 70,391.28, 97,170.39 and 42,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,391.28 : 97,170.39 = 42,091.50 : x
2. Step 2: Convert to fraction form
   70,391.28/97,170.39 = 42,091.50/x
3. Step 3: Cross multiply
   70,391.28x = 97,170.39 × 42,091.50
4. Step 4: Simplify right side
   70,391.28x = 4,090,047,470.69
5. Step 5: Solve for x
   x = 4,090,047,470.69/70,391.28
6. Step 6: Final answer
   x = 58,104.46