Finding the Fourth Proportional to 113,113.69, 156,090.80 and 64,716.58

Step by Step Solution

1. Step 1: Write the proportion equation
   113,113.69 : 156,090.80 = 64,716.58 : x
2. Step 2: Convert to fraction form
   113,113.69/156,090.80 = 64,716.58/x
3. Step 3: Cross multiply
   113,113.69x = 156,090.80 × 64,716.58
4. Step 4: Simplify right side
   113,113.69x = 10,101,662,379.61
5. Step 5: Solve for x
   x = 10,101,662,379.61/113,113.69
6. Step 6: Final answer
   x = 89,305.39