Finding the Fourth Proportional to 64,876.47, 89,473.61 and 42,207.18

Step by Step Solution

1. Step 1: Write the proportion equation
   64,876.47 : 89,473.61 = 42,207.18 : x
2. Step 2: Convert to fraction form
   64,876.47/89,473.61 = 42,207.18/x
3. Step 3: Cross multiply
   64,876.47x = 89,473.61 × 42,207.18
4. Step 4: Simplify right side
   64,876.47x = 3,776,428,551.48
5. Step 5: Solve for x
   x = 3,776,428,551.48/64,876.47
6. Step 6: Final answer
   x = 58,209.53