Finding the Fourth Proportional to 156,431.69, 215,875.83 and 84,812.00

Step by Step Solution

1. Step 1: Write the proportion equation
   156,431.69 : 215,875.83 = 84,812.00 : x
2. Step 2: Convert to fraction form
   156,431.69/215,875.83 = 84,812.00/x
3. Step 3: Cross multiply
   156,431.69x = 215,875.83 × 84,812.00
4. Step 4: Simplify right side
   156,431.69x = 18,308,859,814.58
5. Step 5: Solve for x
   x = 18,308,859,814.58/156,431.69
6. Step 6: Final answer
   x = 117,040.61