Finding the Fourth Proportional to 42,748.16, 64,126.33 and 11,158.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,748.16 : 64,126.33 = 11,158.76 : x
2. Step 2: Convert to fraction form
   42,748.16/64,126.33 = 11,158.76/x
3. Step 3: Cross multiply
   42,748.16x = 64,126.33 × 11,158.76
4. Step 4: Simplify right side
   42,748.16x = 715,570,521.34
5. Step 5: Solve for x
   x = 715,570,521.34/42,748.16
6. Step 6: Final answer
   x = 16,739.21