Finding the Fourth Proportional to 64,306.10, 96,401.55 and 42,130.10

Step by Step Solution

1. Step 1: Write the proportion equation
   64,306.10 : 96,401.55 = 42,130.10 : x
2. Step 2: Convert to fraction form
   64,306.10/96,401.55 = 42,130.10/x
3. Step 3: Cross multiply
   64,306.10x = 96,401.55 × 42,130.10
4. Step 4: Simplify right side
   64,306.10x = 4,061,406,941.66
5. Step 5: Solve for x
   x = 4,061,406,941.66/64,306.10
6. Step 6: Final answer
   x = 63,157.41