Finding the Fourth Proportional to 128,081.81, 176,750.71 and 70,719.71

Step by Step Solution

1. Step 1: Write the proportion equation
   128,081.81 : 176,750.71 = 70,719.71 : x
2. Step 2: Convert to fraction form
   128,081.81/176,750.71 = 70,719.71/x
3. Step 3: Cross multiply
   128,081.81x = 176,750.71 × 70,719.71
4. Step 4: Simplify right side
   128,081.81x = 12,499,758,290.74
5. Step 5: Solve for x
   x = 12,499,758,290.74/128,081.81
6. Step 6: Final answer
   x = 97,591.98