Finding the Fourth Proportional to 64,815, 89,483.58 and 42,497.88

Step by Step Solution

1. Step 1: Write the proportion equation
   64,815 : 89,483.58 = 42,497.88 : x
2. Step 2: Convert to fraction form
   64,815/89,483.58 = 42,497.88/x
3. Step 3: Cross multiply
   64,815x = 89,483.58 × 42,497.88
4. Step 4: Simplify right side
   64,815x = 3,802,862,444.81
5. Step 5: Solve for x
   x = 3,802,862,444.81/64,815
6. Step 6: Final answer
   x = 58,672.57