Finding the Fourth Proportional to 109,490.10, 164,235.15 and 42,908.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,490.10 : 164,235.15 = 42,908.10 : x
2. Step 2: Convert to fraction form
   109,490.10/164,235.15 = 42,908.10/x
3. Step 3: Cross multiply
   109,490.10x = 164,235.15 × 42,908.10
4. Step 4: Simplify right side
   109,490.10x = 7,047,018,239.72
5. Step 5: Solve for x
   x = 7,047,018,239.72/109,490.10
6. Step 6: Final answer
   x = 64,362.15