Finding the Fourth Proportional to 118,530.84, 163,572.72 and 64,815.69

Step by Step Solution

1. Step 1: Write the proportion equation
   118,530.84 : 163,572.72 = 64,815.69 : x
2. Step 2: Convert to fraction form
   118,530.84/163,572.72 = 64,815.69/x
3. Step 3: Cross multiply
   118,530.84x = 163,572.72 × 64,815.69
4. Step 4: Simplify right side
   118,530.84x = 10,602,079,082.32
5. Step 5: Solve for x
   x = 10,602,079,082.32/118,530.84
6. Step 6: Final answer
   x = 89,445.74