Finding the Fourth Proportional to 53,460, 73,689.80 and 42,111.54

Step by Step Solution

1. Step 1: Write the proportion equation
   53,460 : 73,689.80 = 42,111.54 : x
2. Step 2: Convert to fraction form
   53,460/73,689.80 = 42,111.54/x
3. Step 3: Cross multiply
   53,460x = 73,689.80 × 42,111.54
4. Step 4: Simplify right side
   53,460x = 3,103,190,960.29
5. Step 5: Solve for x
   x = 3,103,190,960.29/53,460
6. Step 6: Final answer
   x = 58,046.97