Finding the Fourth Proportional to 111,154.79, 153,413 and 65,858.28

Step by Step Solution

1. Step 1: Write the proportion equation
   111,154.79 : 153,413 = 65,858.28 : x
2. Step 2: Convert to fraction form
   111,154.79/153,413 = 65,858.28/x
3. Step 3: Cross multiply
   111,154.79x = 153,413 × 65,858.28
4. Step 4: Simplify right side
   111,154.79x = 10,103,516,309.64
5. Step 5: Solve for x
   x = 10,103,516,309.64/111,154.79
6. Step 6: Final answer
   x = 90,895.91