Finding the Fourth Proportional to 111,916.32, 154,501.58 and 86,365.28

Step by Step Solution

1. Step 1: Write the proportion equation
   111,916.32 : 154,501.58 = 86,365.28 : x
2. Step 2: Convert to fraction form
   111,916.32/154,501.58 = 86,365.28/x
3. Step 3: Cross multiply
   111,916.32x = 154,501.58 × 86,365.28
4. Step 4: Simplify right side
   111,916.32x = 13,343,571,830.89
5. Step 5: Solve for x
   x = 13,343,571,830.89/111,916.32
6. Step 6: Final answer
   x = 119,228.11