Finding the Fourth Proportional to 9,102.84, 12,561.78 and 5,123.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,102.84 : 12,561.78 = 5,123.94 : x
2. Step 2: Convert to fraction form
   9,102.84/12,561.78 = 5,123.94/x
3. Step 3: Cross multiply
   9,102.84x = 12,561.78 × 5,123.94
4. Step 4: Simplify right side
   9,102.84x = 64,365,807.01
5. Step 5: Solve for x
   x = 64,365,807.01/9,102.84
6. Step 6: Final answer
   x = 7,070.96