Finding the Fourth Proportional to 118,386.63, 163,372.95 and 64,674.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,386.63 : 163,372.95 = 64,674.72 : x
2. Step 2: Convert to fraction form
   118,386.63/163,372.95 = 64,674.72/x
3. Step 3: Cross multiply
   118,386.63x = 163,372.95 × 64,674.72
4. Step 4: Simplify right side
   118,386.63x = 10,566,099,796.82
5. Step 5: Solve for x
   x = 10,566,099,796.82/118,386.63
6. Step 6: Final answer
   x = 89,250.79