Finding the Fourth Proportional to 42,401.07, 63,586.72 and 12,407.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,401.07 : 63,586.72 = 12,407.02 : x
2. Step 2: Convert to fraction form
   42,401.07/63,586.72 = 12,407.02/x
3. Step 3: Cross multiply
   42,401.07x = 63,586.72 × 12,407.02
4. Step 4: Simplify right side
   42,401.07x = 788,921,920.99
5. Step 5: Solve for x
   x = 788,921,920.99/42,401.07
6. Step 6: Final answer
   x = 18,606.18