Finding the Fourth Proportional to 52,854.90, 72,938.18 and 28,980.77

Step by Step Solution

1. Step 1: Write the proportion equation
   52,854.90 : 72,938.18 = 28,980.77 : x
2. Step 2: Convert to fraction form
   52,854.90/72,938.18 = 28,980.77/x
3. Step 3: Cross multiply
   52,854.90x = 72,938.18 × 28,980.77
4. Step 4: Simplify right side
   52,854.90x = 2,113,804,109.20
5. Step 5: Solve for x
   x = 2,113,804,109.20/52,854.90
6. Step 6: Final answer
   x = 39,992.59