Finding the Fourth Proportional to 99,030.78, 136,503.31 and 77,483.36

Step by Step Solution

1. Step 1: Write the proportion equation
   99,030.78 : 136,503.31 = 77,483.36 : x
2. Step 2: Convert to fraction form
   99,030.78/136,503.31 = 77,483.36/x
3. Step 3: Cross multiply
   99,030.78x = 136,503.31 × 77,483.36
4. Step 4: Simplify right side
   99,030.78x = 10,576,735,345.72
5. Step 5: Solve for x
   x = 10,576,735,345.72/99,030.78
6. Step 6: Final answer
   x = 106,802.51