Finding the Fourth Proportional to 191,915.81, 288,123.18 and 147,573.71

Step by Step Solution

1. Step 1: Write the proportion equation
   191,915.81 : 288,123.18 = 147,573.71 : x
2. Step 2: Convert to fraction form
   191,915.81/288,123.18 = 147,573.71/x
3. Step 3: Cross multiply
   191,915.81x = 288,123.18 × 147,573.71
4. Step 4: Simplify right side
   191,915.81x = 42,519,405,168.98
5. Step 5: Solve for x
   x = 42,519,405,168.98/191,915.81
6. Step 6: Final answer
   x = 221,552.39