Finding the Fourth Proportional to 113,511.61, 156,632.31 and 65,111.03

Step by Step Solution

1. Step 1: Write the proportion equation
   113,511.61 : 156,632.31 = 65,111.03 : x
2. Step 2: Convert to fraction form
   113,511.61/156,632.31 = 65,111.03/x
3. Step 3: Cross multiply
   113,511.61x = 156,632.31 × 65,111.03
4. Step 4: Simplify right side
   113,511.61x = 10,198,490,709.82
5. Step 5: Solve for x
   x = 10,198,490,709.82/113,511.61
6. Step 6: Final answer
   x = 89,845.35