Finding the Fourth Proportional to 286,810.56, 430,411.86 and 99,822.06

Step by Step Solution

1. Step 1: Write the proportion equation
   286,810.56 : 430,411.86 = 99,822.06 : x
2. Step 2: Convert to fraction form
   286,810.56/430,411.86 = 99,822.06/x
3. Step 3: Cross multiply
   286,810.56x = 430,411.86 × 99,822.06
4. Step 4: Simplify right side
   286,810.56x = 42,964,598,513.63
5. Step 5: Solve for x
   x = 42,964,598,513.63/286,810.56
6. Step 6: Final answer
   x = 149,801.31