Finding the Fourth Proportional to 109,485.90, 164,233.71 and 42,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,485.90 : 164,233.71 = 42,920.10 : x
2. Step 2: Convert to fraction form
   109,485.90/164,233.71 = 42,920.10/x
3. Step 3: Cross multiply
   109,485.90x = 164,233.71 × 42,920.10
4. Step 4: Simplify right side
   109,485.90x = 7,048,927,256.57
5. Step 5: Solve for x
   x = 7,048,927,256.57/109,485.90
6. Step 6: Final answer
   x = 64,382.06