Finding the Fourth Proportional to 98,256.72, 147,384.60 and 28,136

Step by Step Solution

1. Step 1: Write the proportion equation
   98,256.72 : 147,384.60 = 28,136 : x
2. Step 2: Convert to fraction form
   98,256.72/147,384.60 = 28,136/x
3. Step 3: Cross multiply
   98,256.72x = 147,384.60 × 28,136
4. Step 4: Simplify right side
   98,256.72x = 4,146,813,105.60
5. Step 5: Solve for x
   x = 4,146,813,105.60/98,256.72
6. Step 6: Final answer
   x = 42,203.86