Finding the Fourth Proportional to 156,291, 215,681.67 and 84,671.52

Step by Step Solution

1. Step 1: Write the proportion equation
   156,291 : 215,681.67 = 84,671.52 : x
2. Step 2: Convert to fraction form
   156,291/215,681.67 = 84,671.52/x
3. Step 3: Cross multiply
   156,291x = 215,681.67 × 84,671.52
4. Step 4: Simplify right side
   156,291x = 18,262,094,835.04
5. Step 5: Solve for x
   x = 18,262,094,835.04/156,291
6. Step 6: Final answer
   x = 116,846.75