Finding the Fourth Proportional to 128,275.71, 177,019.27 and 70,916.52

Step by Step Solution

1. Step 1: Write the proportion equation
   128,275.71 : 177,019.27 = 70,916.52 : x
2. Step 2: Convert to fraction form
   128,275.71/177,019.27 = 70,916.52/x
3. Step 3: Cross multiply
   128,275.71x = 177,019.27 × 70,916.52
4. Step 4: Simplify right side
   128,275.71x = 12,553,590,601.34
5. Step 5: Solve for x
   x = 12,553,590,601.34/128,275.71
6. Step 6: Final answer
   x = 97,864.13