Finding the Fourth Proportional to 113,136.66, 156,116.88 and 65,405.34

Step by Step Solution

1. Step 1: Write the proportion equation
   113,136.66 : 156,116.88 = 65,405.34 : x
2. Step 2: Convert to fraction form
   113,136.66/156,116.88 = 65,405.34/x
3. Step 3: Cross multiply
   113,136.66x = 156,116.88 × 65,405.34
4. Step 4: Simplify right side
   113,136.66x = 10,210,877,616.14
5. Step 5: Solve for x
   x = 10,210,877,616.14/113,136.66
6. Step 6: Final answer
   x = 90,252.60