Finding the Fourth Proportional to 19,890.61, 29,833.69 and 5,099.88

Step by Step Solution

1. Step 1: Write the proportion equation
   19,890.61 : 29,833.69 = 5,099.88 : x
2. Step 2: Convert to fraction form
   19,890.61/29,833.69 = 5,099.88/x
3. Step 3: Cross multiply
   19,890.61x = 29,833.69 × 5,099.88
4. Step 4: Simplify right side
   19,890.61x = 152,148,089.79
5. Step 5: Solve for x
   x = 152,148,089.79/19,890.61
6. Step 6: Final answer
   x = 7,649.24