Finding the Fourth Proportional to 113,099.16, 156,089.32 and 64,705.58

Step by Step Solution

1. Step 1: Write the proportion equation
   113,099.16 : 156,089.32 = 64,705.58 : x
2. Step 2: Convert to fraction form
   113,099.16/156,089.32 = 64,705.58/x
3. Step 3: Cross multiply
   113,099.16x = 156,089.32 × 64,705.58
4. Step 4: Simplify right side
   113,099.16x = 10,099,849,040.20
5. Step 5: Solve for x
   x = 10,099,849,040.20/113,099.16
6. Step 6: Final answer
   x = 89,300.83