Finding the Fourth Proportional to 53,308.72, 79,838.70 and 42,140.44

Step by Step Solution

1. Step 1: Write the proportion equation
   53,308.72 : 79,838.70 = 42,140.44 : x
2. Step 2: Convert to fraction form
   53,308.72/79,838.70 = 42,140.44/x
3. Step 3: Cross multiply
   53,308.72x = 79,838.70 × 42,140.44
4. Step 4: Simplify right side
   53,308.72x = 3,364,437,947.03
5. Step 5: Solve for x
   x = 3,364,437,947.03/53,308.72
6. Step 6: Final answer
   x = 63,112.34