Finding the Fourth Proportional to 257,141.34, 385,737.38 and 88,639.48

Step by Step Solution

1. Step 1: Write the proportion equation
   257,141.34 : 385,737.38 = 88,639.48 : x
2. Step 2: Convert to fraction form
   257,141.34/385,737.38 = 88,639.48/x
3. Step 3: Cross multiply
   257,141.34x = 385,737.38 × 88,639.48
4. Step 4: Simplify right side
   257,141.34x = 34,191,559,870.82
5. Step 5: Solve for x
   x = 34,191,559,870.82/257,141.34
6. Step 6: Final answer
   x = 132,967.96