Finding the Fourth Proportional to 70,912.40, 97,856.52 and 42,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,912.40 : 97,856.52 = 42,620.72 : x
2. Step 2: Convert to fraction form
   70,912.40/97,856.52 = 42,620.72/x
3. Step 3: Cross multiply
   70,912.40x = 97,856.52 × 42,620.72
4. Step 4: Simplify right side
   70,912.40x = 4,170,715,339.09
5. Step 5: Solve for x
   x = 4,170,715,339.09/70,912.40
6. Step 6: Final answer
   x = 58,815.04