Finding the Fourth Proportional to 61,032.72, 91,388.88 and 49,123.20

Step by Step Solution

1. Step 1: Write the proportion equation
   61,032.72 : 91,388.88 = 49,123.20 : x
2. Step 2: Convert to fraction form
   61,032.72/91,388.88 = 49,123.20/x
3. Step 3: Cross multiply
   61,032.72x = 91,388.88 × 49,123.20
4. Step 4: Simplify right side
   61,032.72x = 4,489,314,230.02
5. Step 5: Solve for x
   x = 4,489,314,230.02/61,032.72
6. Step 6: Final answer
   x = 73,555.86