Finding the Fourth Proportional to 9,123.81, 12,590.87 and 5,144.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.81 : 12,590.87 = 5,144.93 : x
2. Step 2: Convert to fraction form
   9,123.81/12,590.87 = 5,144.93/x
3. Step 3: Cross multiply
   9,123.81x = 12,590.87 × 5,144.93
4. Step 4: Simplify right side
   9,123.81x = 64,779,056.11
5. Step 5: Solve for x
   x = 64,779,056.11/9,123.81
6. Step 6: Final answer
   x = 7,100.00