Finding the Fourth Proportional to 98,911.89, 136,498.42 and 53,590.18

Step by Step Solution

1. Step 1: Write the proportion equation
   98,911.89 : 136,498.42 = 53,590.18 : x
2. Step 2: Convert to fraction form
   98,911.89/136,498.42 = 53,590.18/x
3. Step 3: Cross multiply
   98,911.89x = 136,498.42 × 53,590.18
4. Step 4: Simplify right side
   98,911.89x = 7,314,974,897.52
5. Step 5: Solve for x
   x = 7,314,974,897.52/98,911.89
6. Step 6: Final answer
   x = 73,954.45