Finding the Fourth Proportional to 112,388.30, 168,665.40 and 53,223.87

Step by Step Solution

1. Step 1: Write the proportion equation
   112,388.30 : 168,665.40 = 53,223.87 : x
2. Step 2: Convert to fraction form
   112,388.30/168,665.40 = 53,223.87/x
3. Step 3: Cross multiply
   112,388.30x = 168,665.40 × 53,223.87
4. Step 4: Simplify right side
   112,388.30x = 8,977,025,323.10
5. Step 5: Solve for x
   x = 8,977,025,323.10/112,388.30
6. Step 6: Final answer
   x = 79,875.09