Finding the Fourth Proportional to 52,690.91, 79,036.43 and 13,248.02

Step by Step Solution

1. Step 1: Write the proportion equation
   52,690.91 : 79,036.43 = 13,248.02 : x
2. Step 2: Convert to fraction form
   52,690.91/79,036.43 = 13,248.02/x
3. Step 3: Cross multiply
   52,690.91x = 79,036.43 × 13,248.02
4. Step 4: Simplify right side
   52,690.91x = 1,047,076,336.72
5. Step 5: Solve for x
   x = 1,047,076,336.72/52,690.91
6. Step 6: Final answer
   x = 19,872.05