Finding the Fourth Proportional to 128,307.51, 177,057.20 and 70,943.52

Step by Step Solution

1. Step 1: Write the proportion equation
   128,307.51 : 177,057.20 = 70,943.52 : x
2. Step 2: Convert to fraction form
   128,307.51/177,057.20 = 70,943.52/x
3. Step 3: Cross multiply
   128,307.51x = 177,057.20 × 70,943.52
4. Step 4: Simplify right side
   128,307.51x = 12,561,061,009.34
5. Step 5: Solve for x
   x = 12,561,061,009.34/128,307.51
6. Step 6: Final answer
   x = 97,898.10