Finding the Fourth Proportional to 113,391.78, 156,477.47 and 65,645.93

Step by Step Solution

1. Step 1: Write the proportion equation
   113,391.78 : 156,477.47 = 65,645.93 : x
2. Step 2: Convert to fraction form
   113,391.78/156,477.47 = 65,645.93/x
3. Step 3: Cross multiply
   113,391.78x = 156,477.47 × 65,645.93
4. Step 4: Simplify right side
   113,391.78x = 10,272,107,931.58
5. Step 5: Solve for x
   x = 10,272,107,931.58/113,391.78
6. Step 6: Final answer
   x = 90,589.53