Finding the Fourth Proportional to 113,026.71, 155,990.67 and 65,280

Step by Step Solution

1. Step 1: Write the proportion equation
   113,026.71 : 155,990.67 = 65,280 : x
2. Step 2: Convert to fraction form
   113,026.71/155,990.67 = 65,280/x
3. Step 3: Cross multiply
   113,026.71x = 155,990.67 × 65,280
4. Step 4: Simplify right side
   113,026.71x = 10,183,070,937.60
5. Step 5: Solve for x
   x = 10,183,070,937.60/113,026.71
6. Step 6: Final answer
   x = 90,094.38