Finding the Fourth Proportional to 10,056.60, 15,090.78 and 4,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,056.60 : 15,090.78 = 4,212.72 : x
2. Step 2: Convert to fraction form
   10,056.60/15,090.78 = 4,212.72/x
3. Step 3: Cross multiply
   10,056.60x = 15,090.78 × 4,212.72
4. Step 4: Simplify right side
   10,056.60x = 63,573,230.72
5. Step 5: Solve for x
   x = 63,573,230.72/10,056.60
6. Step 6: Final answer
   x = 6,321.54