Finding the Fourth Proportional to 153,499.50, 230,262.21 and 42,691.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,499.50 : 230,262.21 = 42,691.50 : x
2. Step 2: Convert to fraction form
   153,499.50/230,262.21 = 42,691.50/x
3. Step 3: Cross multiply
   153,499.50x = 230,262.21 × 42,691.50
4. Step 4: Simplify right side
   153,499.50x = 9,830,239,138.22
5. Step 5: Solve for x
   x = 9,830,239,138.22/153,499.50
6. Step 6: Final answer
   x = 64,040.85