Finding the Fourth Proportional to 66,613.72, 91,837.38 and 64,549.84

Step by Step Solution

1. Step 1: Write the proportion equation
   66,613.72 : 91,837.38 = 64,549.84 : x
2. Step 2: Convert to fraction form
   66,613.72/91,837.38 = 64,549.84/x
3. Step 3: Cross multiply
   66,613.72x = 91,837.38 × 64,549.84
4. Step 4: Simplify right side
   66,613.72x = 5,928,088,185.02
5. Step 5: Solve for x
   x = 5,928,088,185.02/66,613.72
6. Step 6: Final answer
   x = 88,992.00