Finding the Fourth Proportional to 42,729.10, 64,110.06 and 30,090.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,729.10 : 64,110.06 = 30,090.98 : x
2. Step 2: Convert to fraction form
   42,729.10/64,110.06 = 30,090.98/x
3. Step 3: Cross multiply
   42,729.10x = 64,110.06 × 30,090.98
4. Step 4: Simplify right side
   42,729.10x = 1,929,134,693.53
5. Step 5: Solve for x
   x = 1,929,134,693.53/42,729.10
6. Step 6: Final answer
   x = 45,148.03