Finding the Fourth Proportional to 112,658, 155,468.18 and 70,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,658 : 155,468.18 = 70,216.50 : x
2. Step 2: Convert to fraction form
   112,658/155,468.18 = 70,216.50/x
3. Step 3: Cross multiply
   112,658x = 155,468.18 × 70,216.50
4. Step 4: Simplify right side
   112,658x = 10,916,431,460.97
5. Step 5: Solve for x
   x = 10,916,431,460.97/112,658
6. Step 6: Final answer
   x = 96,898.86