Finding the Fourth Proportional to 156,076.30, 215,386.59 and 91,584.10

Step by Step Solution

1. Step 1: Write the proportion equation
   156,076.30 : 215,386.59 = 91,584.10 : x
2. Step 2: Convert to fraction form
   156,076.30/215,386.59 = 91,584.10/x
3. Step 3: Cross multiply
   156,076.30x = 215,386.59 × 91,584.10
4. Step 4: Simplify right side
   156,076.30x = 19,725,986,997.22
5. Step 5: Solve for x
   x = 19,725,986,997.22/156,076.30
6. Step 6: Final answer
   x = 126,386.82