Finding the Fourth Proportional to 64,428.75, 88,950.56 and 42,111.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,428.75 : 88,950.56 = 42,111.63 : x
2. Step 2: Convert to fraction form
   64,428.75/88,950.56 = 42,111.63/x
3. Step 3: Cross multiply
   64,428.75x = 88,950.56 × 42,111.63
4. Step 4: Simplify right side
   64,428.75x = 3,745,852,860.45
5. Step 5: Solve for x
   x = 3,745,852,860.45/64,428.75
6. Step 6: Final answer
   x = 58,139.46