Finding the Fourth Proportional to 119,810.91, 165,309.33 and 78,970.51

Step by Step Solution

1. Step 1: Write the proportion equation
   119,810.91 : 165,309.33 = 78,970.51 : x
2. Step 2: Convert to fraction form
   119,810.91/165,309.33 = 78,970.51/x
3. Step 3: Cross multiply
   119,810.91x = 165,309.33 × 78,970.51
4. Step 4: Simplify right side
   119,810.91x = 13,054,561,271.31
5. Step 5: Solve for x
   x = 13,054,561,271.31/119,810.91
6. Step 6: Final answer
   x = 108,959.71