Finding the Fourth Proportional to 64,742.79, 89,345.04 and 37,890.42

Step by Step Solution

1. Step 1: Write the proportion equation
   64,742.79 : 89,345.04 = 37,890.42 : x
2. Step 2: Convert to fraction form
   64,742.79/89,345.04 = 37,890.42/x
3. Step 3: Cross multiply
   64,742.79x = 89,345.04 × 37,890.42
4. Step 4: Simplify right side
   64,742.79x = 3,385,321,090.52
5. Step 5: Solve for x
   x = 3,385,321,090.52/64,742.79
6. Step 6: Final answer
   x = 52,288.77