Finding the Fourth Proportional to 308,810.34, 463,150.71 and 87,142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,810.34 : 463,150.71 = 87,142.50 : x
2. Step 2: Convert to fraction form
   308,810.34/463,150.71 = 87,142.50/x
3. Step 3: Cross multiply
   308,810.34x = 463,150.71 × 87,142.50
4. Step 4: Simplify right side
   308,810.34x = 40,360,110,746.18
5. Step 5: Solve for x
   x = 40,360,110,746.18/308,810.34
6. Step 6: Final answer
   x = 130,695.46