Finding the Fourth Proportional to 112,548.52, 155,364.78 and 70,128.02

Step by Step Solution

1. Step 1: Write the proportion equation
   112,548.52 : 155,364.78 = 70,128.02 : x
2. Step 2: Convert to fraction form
   112,548.52/155,364.78 = 70,128.02/x
3. Step 3: Cross multiply
   112,548.52x = 155,364.78 × 70,128.02
4. Step 4: Simplify right side
   112,548.52x = 10,895,424,399.14
5. Step 5: Solve for x
   x = 10,895,424,399.14/112,548.52
6. Step 6: Final answer
   x = 96,806.47