Finding the Fourth Proportional to 51,401.90, 70,931.34 and 28,742.76

Step by Step Solution

1. Step 1: Write the proportion equation
   51,401.90 : 70,931.34 = 28,742.76 : x
2. Step 2: Convert to fraction form
   51,401.90/70,931.34 = 28,742.76/x
3. Step 3: Cross multiply
   51,401.90x = 70,931.34 × 28,742.76
4. Step 4: Simplify right side
   51,401.90x = 2,038,762,482.10
5. Step 5: Solve for x
   x = 2,038,762,482.10/51,401.90
6. Step 6: Final answer
   x = 39,663.17