Finding the Fourth Proportional to 265,543.72, 398,157.52 and 105,533.08

Step by Step Solution

1. Step 1: Write the proportion equation
   265,543.72 : 398,157.52 = 105,533.08 : x
2. Step 2: Convert to fraction form
   265,543.72/398,157.52 = 105,533.08/x
3. Step 3: Cross multiply
   265,543.72x = 398,157.52 × 105,533.08
4. Step 4: Simplify right side
   265,543.72x = 42,018,789,410.76
5. Step 5: Solve for x
   x = 42,018,789,410.76/265,543.72
6. Step 6: Final answer
   x = 158,236.80