Finding the Fourth Proportional to 99,762,929.60, 137,737,623.32 and 89,290,810.89

Step by Step Solution

1. Step 1: Write the proportion equation
   99,762,929.60 : 137,737,623.32 = 89,290,810.89 : x
2. Step 2: Convert to fraction form
   99,762,929.60/137,737,623.32 = 89,290,810.89/x
3. Step 3: Cross multiply
   99,762,929.60x = 137,737,623.32 × 89,290,810.89
4. Step 4: Simplify right side
   99,762,929.60x = 12,298,704,075,169,032
5. Step 5: Solve for x
   x = 12,298,704,075,169,032/99,762,929.60
6. Step 6: Final answer
   x = 123,279,299.48