Finding the Fourth Proportional to 42,070.29, 63,111.72 and 12,484.65

Step by Step Solution

1. Step 1: Write the proportion equation
   42,070.29 : 63,111.72 = 12,484.65 : x
2. Step 2: Convert to fraction form
   42,070.29/63,111.72 = 12,484.65/x
3. Step 3: Cross multiply
   42,070.29x = 63,111.72 × 12,484.65
4. Step 4: Simplify right side
   42,070.29x = 787,927,735.10
5. Step 5: Solve for x
   x = 787,927,735.10/42,070.29
6. Step 6: Final answer
   x = 18,728.84