Finding the Fourth Proportional to 99,047, 136,682.66 and 56,020.80

Step by Step Solution

1. Step 1: Write the proportion equation
   99,047 : 136,682.66 = 56,020.80 : x
2. Step 2: Convert to fraction form
   99,047/136,682.66 = 56,020.80/x
3. Step 3: Cross multiply
   99,047x = 136,682.66 × 56,020.80
4. Step 4: Simplify right side
   99,047x = 7,657,071,959.33
5. Step 5: Solve for x
   x = 7,657,071,959.33/99,047
6. Step 6: Final answer
   x = 77,307.46