Finding the Fourth Proportional to 28,477.84, 42,711.72 and 7,702.96

Step by Step Solution

1. Step 1: Write the proportion equation
   28,477.84 : 42,711.72 = 7,702.96 : x
2. Step 2: Convert to fraction form
   28,477.84/42,711.72 = 7,702.96/x
3. Step 3: Cross multiply
   28,477.84x = 42,711.72 × 7,702.96
4. Step 4: Simplify right side
   28,477.84x = 329,006,670.69
5. Step 5: Solve for x
   x = 329,006,670.69/28,477.84
6. Step 6: Final answer
   x = 11,553.08