Finding the Fourth Proportional to 77,921.34, 107,531.46 and 42,111.29

Step by Step Solution

1. Step 1: Write the proportion equation
   77,921.34 : 107,531.46 = 42,111.29 : x
2. Step 2: Convert to fraction form
   77,921.34/107,531.46 = 42,111.29/x
3. Step 3: Cross multiply
   77,921.34x = 107,531.46 × 42,111.29
4. Step 4: Simplify right side
   77,921.34x = 4,528,287,958.53
5. Step 5: Solve for x
   x = 4,528,287,958.53/77,921.34
6. Step 6: Final answer
   x = 58,113.58