Finding the Fourth Proportional to 109,452.10, 164,178.15 and 42,870.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,452.10 : 164,178.15 = 42,870.10 : x
2. Step 2: Convert to fraction form
   109,452.10/164,178.15 = 42,870.10/x
3. Step 3: Cross multiply
   109,452.10x = 164,178.15 × 42,870.10
4. Step 4: Simplify right side
   109,452.10x = 7,038,333,708.32
5. Step 5: Solve for x
   x = 7,038,333,708.32/109,452.10
6. Step 6: Final answer
   x = 64,305.15