Finding the Fourth Proportional to 35,872.72, 53,809.35 and 12,499.12

Step by Step Solution

1. Step 1: Write the proportion equation
   35,872.72 : 53,809.35 = 12,499.12 : x
2. Step 2: Convert to fraction form
   35,872.72/53,809.35 = 12,499.12/x
3. Step 3: Cross multiply
   35,872.72x = 53,809.35 × 12,499.12
4. Step 4: Simplify right side
   35,872.72x = 672,569,522.77
5. Step 5: Solve for x
   x = 672,569,522.77/35,872.72
6. Step 6: Final answer
   x = 18,748.77