Finding the Fourth Proportional to 65,276, 90,080.88 and 38,780

Step by Step Solution

1. Step 1: Write the proportion equation
   65,276 : 90,080.88 = 38,780 : x
2. Step 2: Convert to fraction form
   65,276/90,080.88 = 38,780/x
3. Step 3: Cross multiply
   65,276x = 90,080.88 × 38,780
4. Step 4: Simplify right side
   65,276x = 3,493,336,526.40
5. Step 5: Solve for x
   x = 3,493,336,526.40/65,276
6. Step 6: Final answer
   x = 53,516.40