Finding the Fourth Proportional to 42,031.65, 63,053.55 and 12,445.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42,031.65 : 63,053.55 = 12,445.59 : x
2. Step 2: Convert to fraction form
   42,031.65/63,053.55 = 12,445.59/x
3. Step 3: Cross multiply
   42,031.65x = 63,053.55 × 12,445.59
4. Step 4: Simplify right side
   42,031.65x = 784,738,631.34
5. Step 5: Solve for x
   x = 784,738,631.34/42,031.65
6. Step 6: Final answer
   x = 18,670.18