Finding the Fourth Proportional to 156,384.05, 215,833.04 and 99,028.61

Step by Step Solution

1. Step 1: Write the proportion equation
   156,384.05 : 215,833.04 = 99,028.61 : x
2. Step 2: Convert to fraction form
   156,384.05/215,833.04 = 99,028.61/x
3. Step 3: Cross multiply
   156,384.05x = 215,833.04 × 99,028.61
4. Step 4: Simplify right side
   156,384.05x = 21,373,645,111.68
5. Step 5: Solve for x
   x = 21,373,645,111.68/156,384.05
6. Step 6: Final answer
   x = 136,674.08