Finding the Fourth Proportional to 109,412.10, 164,069.55 and 42,830.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,412.10 : 164,069.55 = 42,830.10 : x
2. Step 2: Convert to fraction form
   109,412.10/164,069.55 = 42,830.10/x
3. Step 3: Cross multiply
   109,412.10x = 164,069.55 × 42,830.10
4. Step 4: Simplify right side
   109,412.10x = 7,027,115,233.46
5. Step 5: Solve for x
   x = 7,027,115,233.46/109,412.10
6. Step 6: Final answer
   x = 64,226.13