Finding the Fourth Proportional to 128,017.83, 176,651.21 and 70,656.10

Step by Step Solution

1. Step 1: Write the proportion equation
   128,017.83 : 176,651.21 = 70,656.10 : x
2. Step 2: Convert to fraction form
   128,017.83/176,651.21 = 70,656.10/x
3. Step 3: Cross multiply
   128,017.83x = 176,651.21 × 70,656.10
4. Step 4: Simplify right side
   128,017.83x = 12,481,485,293.89
5. Step 5: Solve for x
   x = 12,481,485,293.89/128,017.83
6. Step 6: Final answer
   x = 97,498.02