Finding the Fourth Proportional to 9,101.99, 12,561.16 and 5,123.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,101.99 : 12,561.16 = 5,123.36 : x
2. Step 2: Convert to fraction form
   9,101.99/12,561.16 = 5,123.36/x
3. Step 3: Cross multiply
   9,101.99x = 12,561.16 × 5,123.36
4. Step 4: Simplify right side
   9,101.99x = 64,355,363.29
5. Step 5: Solve for x
   x = 64,355,363.29/9,101.99
6. Step 6: Final answer
   x = 7,070.47