Finding the Fourth Proportional to 118,248, 163,185.69 and 64,536.45

Step by Step Solution

1. Step 1: Write the proportion equation
   118,248 : 163,185.69 = 64,536.45 : x
2. Step 2: Convert to fraction form
   118,248/163,185.69 = 64,536.45/x
3. Step 3: Cross multiply
   118,248x = 163,185.69 × 64,536.45
4. Step 4: Simplify right side
   118,248x = 10,531,425,123.40
5. Step 5: Solve for x
   x = 10,531,425,123.40/118,248
6. Step 6: Final answer
   x = 89,062.18