Finding the Fourth Proportional to 64,706.06, 89,343 and 63,672.70

Step by Step Solution

1. Step 1: Write the proportion equation
   64,706.06 : 89,343 = 63,672.70 : x
2. Step 2: Convert to fraction form
   64,706.06/89,343 = 63,672.70/x
3. Step 3: Cross multiply
   64,706.06x = 89,343 × 63,672.70
4. Step 4: Simplify right side
   64,706.06x = 5,688,710,036.10
5. Step 5: Solve for x
   x = 5,688,710,036.10/64,706.06
6. Step 6: Final answer
   x = 87,916.19