Finding the Fourth Proportional to 128,003.04, 176,642.96 and 70,642.89

Step by Step Solution

1. Step 1: Write the proportion equation
   128,003.04 : 176,642.96 = 70,642.89 : x
2. Step 2: Convert to fraction form
   128,003.04/176,642.96 = 70,642.89/x
3. Step 3: Cross multiply
   128,003.04x = 176,642.96 × 70,642.89
4. Step 4: Simplify right side
   128,003.04x = 12,478,568,839.34
5. Step 5: Solve for x
   x = 12,478,568,839.34/128,003.04
6. Step 6: Final answer
   x = 97,486.50