Finding the Fourth Proportional to 109,424.30, 164,070.72 and 42,785.03

Step by Step Solution

1. Step 1: Write the proportion equation
   109,424.30 : 164,070.72 = 42,785.03 : x
2. Step 2: Convert to fraction form
   109,424.30/164,070.72 = 42,785.03/x
3. Step 3: Cross multiply
   109,424.30x = 164,070.72 × 42,785.03
4. Step 4: Simplify right side
   109,424.30x = 7,019,771,087.50
5. Step 5: Solve for x
   x = 7,019,771,087.50/109,424.30
6. Step 6: Final answer
   x = 64,151.85