Finding the Fourth Proportional to 461,312.88, 692,084.52 and 128,886

Step by Step Solution

1. Step 1: Write the proportion equation
   461,312.88 : 692,084.52 = 128,886 : x
2. Step 2: Convert to fraction form
   461,312.88/692,084.52 = 128,886/x
3. Step 3: Cross multiply
   461,312.88x = 692,084.52 × 128,886
4. Step 4: Simplify right side
   461,312.88x = 89,200,005,444.72
5. Step 5: Solve for x
   x = 89,200,005,444.72/461,312.88
6. Step 6: Final answer
   x = 193,361.19