Finding the Fourth Proportional to 118,404.64, 163,397.76 and 64,692.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,404.64 : 163,397.76 = 64,692.72 : x
2. Step 2: Convert to fraction form
   118,404.64/163,397.76 = 64,692.72/x
3. Step 3: Cross multiply
   118,404.64x = 163,397.76 × 64,692.72
4. Step 4: Simplify right side
   118,404.64x = 10,570,645,536.31
5. Step 5: Solve for x
   x = 10,570,645,536.31/118,404.64
6. Step 6: Final answer
   x = 89,275.60