Finding the Fourth Proportional to 9,102.51, 12,561.43 and 5,123.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,102.51 : 12,561.43 = 5,123.62 : x
2. Step 2: Convert to fraction form
   9,102.51/12,561.43 = 5,123.62/x
3. Step 3: Cross multiply
   9,102.51x = 12,561.43 × 5,123.62
4. Step 4: Simplify right side
   9,102.51x = 64,359,993.98
5. Step 5: Solve for x
   x = 64,359,993.98/9,102.51
6. Step 6: Final answer
   x = 7,070.58