Finding the Fourth Proportional to 90,136.56, 134,870.04 and 56,700.48

Step by Step Solution

1. Step 1: Write the proportion equation
   90,136.56 : 134,870.04 = 56,700.48 : x
2. Step 2: Convert to fraction form
   90,136.56/134,870.04 = 56,700.48/x
3. Step 3: Cross multiply
   90,136.56x = 134,870.04 × 56,700.48
4. Step 4: Simplify right side
   90,136.56x = 7,647,196,005.62
5. Step 5: Solve for x
   x = 7,647,196,005.62/90,136.56
6. Step 6: Final answer
   x = 84,840.11