Finding the Fourth Proportional to 49,978.91, 74,931.32 and 30,252.80

Step by Step Solution

1. Step 1: Write the proportion equation
   49,978.91 : 74,931.32 = 30,252.80 : x
2. Step 2: Convert to fraction form
   49,978.91/74,931.32 = 30,252.80/x
3. Step 3: Cross multiply
   49,978.91x = 74,931.32 × 30,252.80
4. Step 4: Simplify right side
   49,978.91x = 2,266,881,938.67
5. Step 5: Solve for x
   x = 2,266,881,938.67/49,978.91
6. Step 6: Final answer
   x = 45,356.77