Finding the Fourth Proportional to 112,986.56, 155,856.64 and 70,471.20

Step by Step Solution

1. Step 1: Write the proportion equation
   112,986.56 : 155,856.64 = 70,471.20 : x
2. Step 2: Convert to fraction form
   112,986.56/155,856.64 = 70,471.20/x
3. Step 3: Cross multiply
   112,986.56x = 155,856.64 × 70,471.20
4. Step 4: Simplify right side
   112,986.56x = 10,983,404,448.77
5. Step 5: Solve for x
   x = 10,983,404,448.77/112,986.56
6. Step 6: Final answer
   x = 97,209.83