Finding the Fourth Proportional to 65,499.78, 90,384.84 and 37,200

Step by Step Solution

1. Step 1: Write the proportion equation
   65,499.78 : 90,384.84 = 37,200 : x
2. Step 2: Convert to fraction form
   65,499.78/90,384.84 = 37,200/x
3. Step 3: Cross multiply
   65,499.78x = 90,384.84 × 37,200
4. Step 4: Simplify right side
   65,499.78x = 3,362,316,048
5. Step 5: Solve for x
   x = 3,362,316,048/65,499.78
6. Step 6: Final answer
   x = 51,333.24