Finding the Fourth Proportional to 139,109,391.36, 208,596,971.52 and 58,308,664.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,109,391.36 : 208,596,971.52 = 58,308,664.32 : x
2. Step 2: Convert to fraction form
   139,109,391.36/208,596,971.52 = 58,308,664.32/x
3. Step 3: Cross multiply
   139,109,391.36x = 208,596,971.52 × 58,308,664.32
4. Step 4: Simplify right side
   139,109,391.36x = 12,163,010,790,528,280
5. Step 5: Solve for x
   x = 12,163,010,790,528,280/139,109,391.36
6. Step 6: Final answer
   x = 87,434,864.55