Finding the Fourth Proportional to 65,312.42, 90,149.76 and 38,470.40

Step by Step Solution

1. Step 1: Write the proportion equation
   65,312.42 : 90,149.76 = 38,470.40 : x
2. Step 2: Convert to fraction form
   65,312.42/90,149.76 = 38,470.40/x
3. Step 3: Cross multiply
   65,312.42x = 90,149.76 × 38,470.40
4. Step 4: Simplify right side
   65,312.42x = 3,468,097,327.10
5. Step 5: Solve for x
   x = 3,468,097,327.10/65,312.42
6. Step 6: Final answer
   x = 53,100.12