Finding the Fourth Proportional to 271,602.10, 407,111.55 and 103,057.30

Step by Step Solution

1. Step 1: Write the proportion equation
   271,602.10 : 407,111.55 = 103,057.30 : x
2. Step 2: Convert to fraction form
   271,602.10/407,111.55 = 103,057.30/x
3. Step 3: Cross multiply
   271,602.10x = 407,111.55 × 103,057.30
4. Step 4: Simplify right side
   271,602.10x = 41,955,817,141.82
5. Step 5: Solve for x
   x = 41,955,817,141.82/271,602.10
6. Step 6: Final answer
   x = 154,475.30