Finding the Fourth Proportional to 42,089.22, 63,122.90 and 12,499.11

Step by Step Solution

1. Step 1: Write the proportion equation
   42,089.22 : 63,122.90 = 12,499.11 : x
2. Step 2: Convert to fraction form
   42,089.22/63,122.90 = 12,499.11/x
3. Step 3: Cross multiply
   42,089.22x = 63,122.90 × 12,499.11
4. Step 4: Simplify right side
   42,089.22x = 788,980,008.12
5. Step 5: Solve for x
   x = 788,980,008.12/42,089.22
6. Step 6: Final answer
   x = 18,745.42