Finding the Fourth Proportional to 52,865.86, 72,955.89 and 28,991.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,865.86 : 72,955.89 = 28,991.10 : x
2. Step 2: Convert to fraction form
   52,865.86/72,955.89 = 28,991.10/x
3. Step 3: Cross multiply
   52,865.86x = 72,955.89 × 28,991.10
4. Step 4: Simplify right side
   52,865.86x = 2,115,071,502.58
5. Step 5: Solve for x
   x = 2,115,071,502.58/52,865.86
6. Step 6: Final answer
   x = 40,008.27