Finding the Fourth Proportional to 113,276.21, 156,304.04 and 64,870.61

Step by Step Solution

1. Step 1: Write the proportion equation
   113,276.21 : 156,304.04 = 64,870.61 : x
2. Step 2: Convert to fraction form
   113,276.21/156,304.04 = 64,870.61/x
3. Step 3: Cross multiply
   113,276.21x = 156,304.04 × 64,870.61
4. Step 4: Simplify right side
   113,276.21x = 10,139,537,314.39
5. Step 5: Solve for x
   x = 10,139,537,314.39/113,276.21
6. Step 6: Final answer
   x = 89,511.63