Finding the Fourth Proportional to 9,902.76, 13,671.60 and 5,925.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,902.76 : 13,671.60 = 5,925.12 : x
2. Step 2: Convert to fraction form
   9,902.76/13,671.60 = 5,925.12/x
3. Step 3: Cross multiply
   9,902.76x = 13,671.60 × 5,925.12
4. Step 4: Simplify right side
   9,902.76x = 81,005,870.59
5. Step 5: Solve for x
   x = 81,005,870.59/9,902.76
6. Step 6: Final answer
   x = 8,180.13