Finding the Fourth Proportional to 155,980.55, 215,263.00 and 87,972.71

Step by Step Solution

1. Step 1: Write the proportion equation
   155,980.55 : 215,263.00 = 87,972.71 : x
2. Step 2: Convert to fraction form
   155,980.55/215,263.00 = 87,972.71/x
3. Step 3: Cross multiply
   155,980.55x = 215,263.00 × 87,972.71
4. Step 4: Simplify right side
   155,980.55x = 18,937,267,956.55
5. Step 5: Solve for x
   x = 18,937,267,956.55/155,980.55
6. Step 6: Final answer
   x = 121,407.88